CN218896774U

CN218896774U - Battery module liquid cooling plate thermal runaway exhaust flue structure and battery pack

Info

Publication number: CN218896774U
Application number: CN202223012807.6U
Authority: CN
Inventors: 孙世强
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-04-21
Anticipated expiration: 2032-11-11

Abstract

The embodiment of the utility model provides a battery module liquid cooling plate thermal runaway exhaust flue structure and a battery pack, and relates to the field of battery packs. The battery pack thermal runaway isolation protection and temperature management efficiency are improved. The battery module liquid cooling plate thermal runaway exhaust flue structure comprises a battery module, an explosion-proof valve and a liquid cooling plate, wherein the battery module is provided with an end face, and the explosion-proof valve is arranged on the end face; the liquid cooling plate is provided with a circulating runner, a water inlet and a water outlet; the liquid cooling plate is arranged on one side of the end face of the battery module, the liquid cooling plate is covered on the explosion-proof valve, a guide flue is formed between the liquid cooling plate and the end face in a surrounding mode, and the guide flue is communicated with an exhaust channel on the battery pack shell to discharge thermal runaway spraying substances to the external environment. The battery pack includes the above-described structure. The end face where the battery module explosion-proof valve is located is provided with a guide flue constructed by a liquid cooling plate, and the guide flue is communicated with an exhaust channel into a whole, so that the thermal runaway injection substances are discharged to the external environment and cannot be diffused to the adjacent battery modules.

Description

Battery module liquid cooling plate thermal runaway exhaust flue structure and battery pack

Technical Field

The utility model relates to the field of battery packs, in particular to a battery module liquid cooling plate thermal runaway exhaust flue structure and a battery pack.

Background

With the popularization of new energy automobiles, the accidents of heat diffusion safety of vehicle battery packs are more and more, and even the life safety of personnel is endangered. The thermal diffusion of the battery pack is mostly caused by the fact that single-chip or multi-chip battery cells in local areas are subjected to thermal runaway, and the thermal runaway is freely sprayed and diffused from the explosion-proof valve to adjacent or other modules, so that large-area thermal runaway in the battery pack is caused, and finally, the battery pack, a vehicle fires or explodes. It also means higher maintenance costs for the end user once thermal runaway occurs; for the whole vehicle manufacturer, the high-performance requirement of the vehicle is also proposed to meet the high-frequency attendance requirement of the user side, the charge and discharge performance of the vehicle is greatly reduced in a high-temperature environment or a low-temperature environment, and if the user complains of slow charge in winter, the endurance mileage is low; in summer, the high temperature is limited in power.

In the current state of thermal runaway safety, in order to inhibit thermal diffusion, an integral piece of heat-insulating fireproof material, such as a mica plate or a fireproof pad, is usually placed right above a battery module, and a charged medium or high-temperature gas ejected by thermal runaway of a battery cell can diffuse into the whole inner cavity space of the battery pack, so that the thermal runaway of adjacent or other battery modules is triggered.

Triggering of whole package thermal runaway is faced with the user need to change the battery package, and the cost is high. The high-temperature medium sprayed out of thermal runaway can not be cooled and is directly sprayed to the external environment through the explosion-proof valve, so that the high-temperature ablation of the side coaming of the vehicle can be caused, and the maintenance cost of the vehicle can be further improved.

Disclosure of Invention

The utility model aims to provide a battery module liquid cooling plate thermal runaway exhaust flue structure, which can improve the isolation protection and the temperature management efficiency of battery pack thermal runaway.

The utility model also aims to provide a battery pack, which can improve the isolation protection and the temperature management efficiency of the thermal runaway of the battery pack.

Embodiments of the utility model may be implemented as follows:

the embodiment of the utility model provides a battery module liquid cooling plate thermal runaway exhaust flue structure which is used for being matched with a battery package shell, wherein the battery package shell is provided with an exhaust channel, and the battery module liquid cooling plate thermal runaway exhaust flue structure comprises a battery module, an explosion-proof valve and a liquid cooling plate; the battery module is provided with an end face, and the explosion-proof valve is arranged on the end face; the liquid cooling plate is provided with a circulating flow passage, a water inlet communicated with the circulating flow passage and a water outlet communicated with the circulating flow passage; the liquid cooling plate is arranged on one side of the end face of the battery module, the liquid cooling plate is covered on the explosion-proof valve, a guide flue is formed between the liquid cooling plate and the end face in an enclosing mode, and the guide flue is used for being communicated with an exhaust channel on the battery pack shell so as to discharge thermal runaway spraying substances to the external environment.

In addition, the battery module liquid cooling plate thermal runaway exhaust flue structure provided by the embodiment of the utility model can also have the following additional technical characteristics:

optionally, the end surfaces include a first end surface and a second end surface opposite to each other on the battery module; the explosion-proof valve comprises a first explosion-proof valve arranged on the first end face and a second explosion-proof valve arranged on the second end face; the liquid cooling plate comprises a first guide flue cooling plate and a second guide flue cooling plate, the first guide flue cooling plate is arranged on one side of the first end face of the battery module, and a first flue for covering the first explosion-proof valve is enclosed between the first guide flue cooling plate and the first end face; the second guide flue cold plate is arranged on one side of the second end face of the battery module, and a second flue for covering the second explosion-proof valve is enclosed between the second guide flue cold plate and the second end face; the first flue and the second flue are respectively used for being communicated with an exhaust channel on the battery pack shell.

Optionally, the number of the battery modules is a plurality, the plurality of battery modules are arranged side by side, and the first end face and the second end face of any two adjacent battery modules are adjacent;

the number of the first guide flue cold plates is multiple, and the number of the second guide flue cold plates is multiple; and the first guide flue cold plate and the second guide flue cold plate are arranged between any two adjacent battery modules so as to form the first flue and the second flue.

Optionally, two ends of the first flue are opened, and the two ends of the first flue are respectively used for communicating with an exhaust channel on the battery pack shell;

the two ends of the second flue are arranged in an open mode, and the two ends of the second flue are respectively communicated with the exhaust channel on the battery pack shell.

Optionally, the liquid cooling plate comprises a first cooling plate, a second cooling plate and a third cooling plate which are sequentially connected and are arranged at an included angle; the first cold plate and the third cold plate are positioned on the same side of the second cold plate, and the first cold plate, the second cold plate, the third cold plate and the end face enclose the guide flue.

Optionally, the liquid cooling plate further comprises a fourth cooling plate; the first cold plate, the second cold plate, the third cold plate and the fourth cold plate are connected in sequence, the fourth cold plate and the third cold plate are arranged at an included angle, and the fourth cold plate and the end face are fixed.

Optionally, the first cold plate, the second cold plate, the third cold plate and the fourth cold plate together provide the circulation flow channel; the water inlet and the water outlet are respectively arranged at two ends of the third cold plate.

Optionally, the battery module liquid cooling plate thermal runaway exhaust flue structure further comprises a heat conducting structure, and the heat conducting structure is arranged between the fourth cooling plate and the end face.

The embodiment of the utility model also provides a battery pack, which comprises a battery pack shell and a battery module liquid cooling plate thermal runaway exhaust flue structure; the battery pack shell is provided with an exhaust channel, and the guide flue is communicated with the exhaust channel.

Optionally, the number of the exhaust channels is two, the two exhaust channels are respectively arranged on two opposite side walls of the battery pack shell, and two ends of the guide flue are respectively communicated with the two exhaust channels.

The battery module liquid cooling plate thermal runaway exhaust flue structure and the battery pack have the beneficial effects that:

the battery module liquid cooling plate thermal runaway exhaust flue structure comprises a battery module, an explosion-proof valve and a liquid cooling plate; the battery module is provided with an end face, and the explosion-proof valve is arranged on the end face; the liquid cooling plate is provided with a circulating flow passage, a water inlet communicated with the circulating flow passage and a water outlet communicated with the circulating flow passage; the liquid cooling plate is arranged on one side of the end face of the battery module, the liquid cooling plate is covered on the explosion-proof valve, a guide flue is formed between the liquid cooling plate and the end face in a surrounding mode, and the guide flue is communicated with an exhaust channel on the battery pack shell to discharge thermal runaway spraying substances to the external environment.

The end face where the explosion-proof valve of the battery module is located is provided with a guide flue constructed by a liquid cooling plate, the explosion-proof valve is covered by the guide flue and communicated with an exhaust channel in the battery package body as a whole, so that the space in the first flue and the second flue is relatively isolated from the space in the battery package field to form an isolated exhaust corridor, and the conductive medium or high-temperature gas sprayed by the battery module in thermal runaway is isolated from the battery module. When the battery module is out of control, high-temperature medium or gas can be sprayed out from the explosion-proof valve, the guide flue is directly filled, and at the moment, circulating cooling liquid in the liquid cooling plate takes away heat of the high-temperature medium or gas.

The battery pack comprises the battery module liquid cooling plate thermal runaway exhaust flue structure, and can improve the isolation protection and the temperature management efficiency of the battery pack thermal runaway.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of an internal structure of a battery pack according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a thermal runaway exhaust stack structure of a liquid cooling plate of a battery module according to an embodiment of the present utility model;

FIG. 3 is an assembly diagram of a thermal runaway exhaust stack structure of a battery module liquid cooling plate according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of C in FIG. 3;

fig. 5 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a first view angle of a battery cell according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a second view angle of a battery cell according to an embodiment of the present utility model.

Icon: 200-battery pack; 210-a battery pack case; 220-exhaust passage; a 100-cell module; 101-a first end face; 102-a second end face; 131-a first explosion valve; 132-a second explosion valve; 141-a water inlet; 142-water outlet; 160-a first flue; 170-a second flue; 110-a first guide flue cold plate; 140-a second guide flue cold plate; 111-a first cold plate; 112-a second cold plate; 113-a third cold plate; 114-a fourth cold plate; 120-a first thermally conductive structure; 150-a second thermally conductive structure; 130-cell.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, if the terms "upper", "lower", "inner", "outer", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus it should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, if any, are used merely for distinguishing between descriptions and not for indicating or implying a relative importance.

It should be noted that the features of the embodiments of the present utility model may be combined with each other without conflict.

The following describes the structure of the thermal runaway exhaust flue of the liquid cooling plate of the battery module according to the present embodiment in detail with reference to fig. 1 to 7.

Referring to fig. 1, 2, 3 and 4, the present embodiment provides a thermal runaway exhaust flue structure of a battery module liquid cooling plate, which is used for being matched with a battery pack housing 210, wherein the battery pack housing 210 is provided with an exhaust channel 220. The battery module liquid cooling plate thermal runaway exhaust flue structure comprises a battery module 100, an explosion-proof valve and a liquid cooling plate; the battery module 100 has an end face on which an explosion-proof valve is provided; the liquid cooling plate is provided with a circulating flow passage, a water inlet 141 communicated with the circulating flow passage and a water outlet 142 communicated with the circulating flow passage; the liquid cooling plate is disposed at one side of the end surface of the battery module 100, and the liquid cooling plate is covered on the explosion-proof valve, a guide flue is enclosed between the liquid cooling plate and the end surface, and the guide flue is used for communicating with the exhaust channel 220 on the battery pack case 210 so as to discharge the thermal runaway ejected material to the external environment.

The end face of the explosion-proof valve of the battery module 100 is provided with a guide flue constructed by a liquid cooling plate, the explosion-proof valve is covered by the guide flue and communicated with the exhaust channel 220 in the battery pack shell 210 into a whole, so that the space in the first flue 160 and the second flue 170 is relatively isolated from the space in the battery pack 200 to form an isolated exhaust corridor, and the conductive medium or high-temperature gas which is sprayed in thermal runaway of the battery module 100 is isolated from the battery module 100. When the battery module 100 is out of control, high temperature medium or gas is ejected from the explosion-proof valve to directly fill the guide flue, and the circulating cooling liquid in the liquid cooling plate takes away the heat of the high temperature medium or gas, and meanwhile, the cooled gas in the guide flue is discharged through the external valve through the exhaust channel 220 on the battery pack shell 210, so that the purposes of reducing the isolation of the high temperature gas and local thermal runaway are achieved.

After the set pressure is reached, the explosion-proof valve on the end face is opened instantly, and charged medium or high-temperature gas is discharged to the external environment through the guide flue and the exhaust channel 220, so that effective isolation protection of heat diffusion is realized, and secondary triggering of thermal runaway of a normal module in the battery pack 200 is also prevented. In addition, the circulating cooling liquid in the liquid cooling plate cools the high-temperature medium or gas in the guide flue, so that the high-temperature ablation of the side coaming of the vehicle caused by the injection of high-temperature substances to the external environment by the explosion-proof valve is prevented, and the heat management heating or cooling efficiency of the thermal battery is improved. The design of the liquid cooling plate further controls the temperature of the battery pack 200 in an optimal interval, and also reduces the temperature difference of the whole pack battery cell 130, thereby improving the electric power performance of the whole pack. Meanwhile, after thermal runaway occurs, only the upper cover of the battery pack 200 is required to be disassembled, and the battery module 100 with thermal runaway is disassembled to replace a new battery module 100, so that the maintenance cost is greatly reduced compared with the whole pack replacement, and the maintenance cost of the vehicle is also reduced.

Referring to fig. 2, 3 and 4, in the present embodiment, the end faces include a first end face 101 and a second end face 102 opposite to each other on the battery module 100; the explosion-proof valves comprise a first explosion-proof valve 131 arranged on the first end face 101 and a second explosion-proof valve 132 arranged on the second end face 102; the liquid cooling plate comprises a first guide flue cold plate 110 and a second guide flue cold plate 140, the first guide flue cold plate 110 is arranged on one side of the first end face 101 of the battery module 100, and a first flue 160 covering the first explosion-proof valve 131 is enclosed between the first guide flue cold plate 110 and the first end face 101; the second guide flue cold plate 140 is arranged at one side of the second end surface 102 of the battery module 100, and a second flue 170 covering the second explosion-proof valve 132 is enclosed between the second guide flue cold plate 140 and the second end surface 102; the first flue 160 and the second flue 170 are respectively used for communicating with an exhaust passage 220 on the battery pack case 210.

The first end face 101 and the second end face 102 where the first explosion-proof valve 131 and the second explosion-proof valve 132 of the battery module 100 are located are respectively provided with a first flue 160 constructed by a first guide flue cold plate 110 and a second flue 170 constructed by a second guide flue cold plate 140, and the first flue 160 and the second flue 170 are connected with the exhaust channel 220 into a whole to form an isolated exhaust corridor, so that the conductive medium or the high-temperature gas sprayed by the battery module in thermal runaway is isolated from the adjacent battery module 100. The first explosion-proof valve 131 of the battery cell 130 in the battery module 100 faces the first flue 160 of the first guide flue cold plate 110; the second explosion proof valve 132 of the battery cell 130 in the battery module 100 faces the second stack 170 of the second guide stack cold plate 140.

The first guide flue cooling plate 110 and the second guide flue cooling plate 140 are made of metal materials, and a circulation flow channel for flowing liquid into the water inlet 141 and flowing out of the water outlet 142 is designed in the interior.

Referring to fig. 1, in the present embodiment, the number of battery modules 100 is plural, the plural battery modules 100 are arranged side by side, and the first end face 101 and the second end face 102 of any adjacent two battery modules 100 are positioned adjacent; the number of the first guide flue cold plates 110 is plural, and the number of the second guide flue cold plates 140 is plural; a first guide duct cold plate 110 and a second guide duct cold plate 140 are disposed between any two adjacent battery modules 100 to form a first duct 160 and a second duct 170.

The battery pack 200 may be composed of N battery modules 100, N.gtoreq.1. The battery module 100 comprises N pieces of electric cores 130 which are overlapped in parallel, wherein N is more than or equal to 1. The first and

second flues

160 and 170 penetrate the entire battery module 100.

Referring to fig. 6 and 7, the opposite corners of the two ends of the battery cell 130 are respectively provided with a first explosion-proof valve 131 and a second explosion-proof valve 132, the first explosion-proof valves 131 of the battery cells 130 are all located in the first flue 160, and the second explosion-proof valves 132 of the battery cells 130 are all located in the second flue 170.

Referring to the relative positions in fig. 1, the number of battery modules 100 is two, the left end surface of the left battery module 100 is the first end surface 101, the right end surface is the second end surface 102, the left end surface of the right battery module 100 is the first end surface 101, the right end surface is the second end surface 102, and the first end surface 101 of the left battery module 100 is disposed adjacent to the second end surface 102 of the right battery module 100. The left side of the left battery module 100 is provided with a first flue 160, the right side is provided with a second flue 170, the left side of the right battery module 100 is provided with the first flue 160, the right side is provided with the second flue 170, and the first flue 160 and the second flue 170 are arranged between the left battery module 100 and the right battery module 100. The high-temperature medium and the gas ejected from the thermal runaway are discharged from between the battery modules 100, and are not diffused to the adjacent battery modules 100, and thus, the thermal runaway is not diffused.

Referring to fig. 1 and 2, in the present embodiment, two ends of the first flue 160 are opened, and two ends of the first flue 160 are respectively used for communicating with the exhaust channel 220 on the battery pack case 210; the two ends of the second flue 170 are opened, and the two ends of the second flue 170 are respectively used for communicating with the exhaust channel 220 on the battery pack housing 210.

Referring to fig. 1, the first and

second flues

160 and 170 penetrate the entire battery module 100, two ends of the first and

second flues

160 and 170 are opened, and the openings at the two ends are communicated with the exhaust passage 220 of the battery pack case 210 as a whole, so that the spaces in the first and

second flues

160 and 170 are relatively isolated from the field space of the battery pack 200.

Arrows a and B are the gas guides in the first flue 160 and the second flue 170, respectively, and both arrows a and B are bidirectional, and the ejected material after thermal runaway is discharged from both ends of the first flue 160 and the second flue 170.

Referring to fig. 3 and 4, in the present embodiment, the liquid cooling plate includes a first cooling plate 111, a second cooling plate 112 and a third cooling plate 113 that are sequentially connected and are disposed at an included angle with each other; the first cold plate 111 and the third cold plate 113 are located on the same side of the second cold plate 112, and the first cold plate 111, the second cold plate 112, the third cold plate 113 and the end face enclose a guide flue.

Specifically, the first cold plate 111 is horizontally disposed, the second cold plate 112 is vertically disposed, and the third cold plate 113 is horizontally disposed, as described with respect to the positions of fig. 4. Specifically, the first cold plate 111, the second cold plate 112 and the third cold plate 113 are connected to form an open C-shaped guide flue, and form a first flue 160 with the first end face 101 of the battery module 100 and form a second flue 170 with the second end face 102 of the battery module 100.

It should be noted that: the first guide duct cold plate 110 and the second guide duct cold plate 140 have the same structure, and each includes a first cold plate 111, a second cold plate 112, and a third cold plate 113.

Referring to fig. 3 and 4, in the present embodiment, the liquid cooling plate further includes a fourth cooling plate 114; the first cold plate 111, the second cold plate 112, the third cold plate 113 and the fourth cold plate 114 are sequentially connected, the fourth cold plate 114 and the third cold plate 113 are arranged at an included angle, and the fourth cold plate 114 is fixed with the end face.

Specifically, the first cold plate 111, the second cold plate 112, the third cold plate 113 and the fourth cold plate 114 are sequentially arranged from bottom to top, and the fourth cold plate 114 is vertically arranged, as described with reference to the relative positions in fig. 4.

Similarly, the first guide stack cold plate 110 and the second guide stack cold plate 140 each include a fourth cold plate 114.

Referring to fig. 5, in the present embodiment, the first, second, third and fourth

cold plates

111, 112, 113 and 114 are commonly provided with a circulation flow channel; the water inlet 141 and the water outlet 142 are respectively provided at both ends of the third cold plate 113.

The water inlet 141 and the water outlet 142 may be provided at both ends of the first, second or third

cold plates

111, 112 or 113. Similarly, the first guide flue cooling plate 110 and the second guide flue cooling plate 140 are provided with a water inlet 141 and a water outlet 142. The water inlet 141 may also be used as the water outlet 142, and the water outlet 142 may also be used as the water inlet 141.

Referring to fig. 2, 3 and 4, in the present embodiment, the battery module liquid cooling plate thermal runaway exhaust flue structure further includes a heat conducting structure, and the heat conducting structure is disposed between the fourth cooling plate 114 and the end surface.

Specifically, the heat conducting structure includes a first heat conducting structure 120 and a second heat conducting structure 150, the first heat conducting structure 120 is disposed between the first end face 101 and the first guiding flue cold plate 110, and the second heat conducting structure 150 is disposed between the second end face 102 and the second guiding flue cold plate 140. The first guide flue cold plate 110 is attached to the first heat conducting structure 120, a first flue 160 is formed between the first guide flue cold plate 110 and the first end face 101, the second guide flue cold plate 140 is attached to the second heat conducting structure 150, and a second flue 170 is formed between the second guide flue cold plate 140 and the second end face 102.

The first heat conductive structure 120 and the second heat conductive structure 150 are made of a heat conductive pad, a structural adhesive or a heat conductive structural adhesive.

Due to the existence of the first heat conduction structure 120 and the second heat conduction structure 150, when the temperature of the battery cell 130 is high, heat generated by the battery cell 130 can be transferred to the first guide flue cold plate 110 and the second guide flue cold plate 140, and heat exchange is performed through liquid flowing in the first guide flue cold plate 110 and the second guide flue cold plate 140, so that the purpose of rapid cooling is achieved. Similarly, when the temperature of the battery cell 130 is low, the external heating device of the vehicle heats the liquid flowing in the first guide flue cold plate 110 and the second guide flue cold plate 140, and the liquid is transferred to the battery cell 130 through the first heat conduction structure 120 and the second heat conduction structure 150, so that the purpose of rapid temperature rise is achieved.

According to the thermal runaway exhaust flue structure of the battery module liquid cooling plate provided by the embodiment, the working principle of the thermal runaway exhaust flue structure of the battery module liquid cooling plate is as follows: a guide flue is constructed on the liquid cooling plate at the side of the battery module 100 to cool down the material sprayed in thermal runaway, so that the material can be prevented from being diffused to adjacent or other modules to cause secondary triggering, and the spraying position can be prevented from being sprayed to the external environment to generate high-temperature ablation.

The battery module liquid cooling plate thermal runaway exhaust flue structure provided by the embodiment has the following advantages:

the guide flue covered on the explosion-proof valve is communicated with the exhaust channel 220 on the battery pack shell 210, is isolated from the environment of the module bin, and the conductive medium or high-temperature gas sprayed by thermal runaway cannot diffuse to adjacent or other modules, so that secondary triggering is caused. After thermal runaway occurs, maintenance is performed by only disassembling the upper cover of the battery pack 200, and the module with thermal runaway is disassembled and replaced by a new module, so that the maintenance cost is greatly reduced compared with the whole pack replacement, and the maintenance cost of the vehicle is also reduced.

The circulating cooling liquid in the liquid cooling plate takes away the heat of the high-temperature medium or gas sprayed in thermal runaway, so that the high-temperature ablation caused by spraying to the external environment is avoided. The heating or cooling efficiency of thermal battery thermal management is improved.

The design of the multi-surface liquid cooling plate further controls the temperature of the battery pack 200 in an optimal interval, and also reduces the temperature difference of the whole pack battery cell 130, thereby improving the electric power performance of the whole pack.

The embodiment of the utility model also provides a battery pack 200, wherein the battery pack 200 comprises a battery pack shell 210 and a battery module liquid cooling plate thermal runaway exhaust flue structure; the battery pack case 210 is provided with an exhaust passage 220, and the guide flue communicates with the exhaust passage 220. The insulation protection and the temperature management efficiency of the battery pack 200 for thermal runaway are improved.

In this embodiment, the number of the exhaust channels 220 is two, the two exhaust channels 220 are respectively disposed on two opposite sidewalls of the battery pack case 210, and two ends of the guiding flue are respectively communicated with the two exhaust channels 220. The battery module 100 is disposed between the two exhaust passages 220, both ends of the first flue 160 are respectively communicated with the two exhaust passages 220, and both ends of the second flue 170 are respectively communicated with the two exhaust passages 220.

The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A battery module liquid cooling plate thermal runaway exhaust flue structure for cooperate with battery package casing (210), battery package casing (210) are provided with exhaust passage (220), its characterized in that, battery module liquid cooling plate thermal runaway exhaust flue structure includes:

a battery module (100) and an explosion-proof valve, wherein the battery module (100) is provided with an end face, and the explosion-proof valve is arranged on the end face;

the liquid cooling plate is provided with a circulating flow channel, a water inlet (141) communicated with the circulating flow channel and a water outlet (142) communicated with the circulating flow channel; the liquid cooling plate is arranged on one side of the end face of the battery module (100), the liquid cooling plate is covered on the explosion-proof valve, a guide flue is formed between the liquid cooling plate and the end face in a surrounding mode, and the guide flue is used for being communicated with an exhaust channel (220) on the battery pack shell (210) so as to discharge thermal runaway injection substances to the external environment.

2. The battery module liquid cooling panel thermal runaway exhaust stack structure of claim 1, wherein:

the end faces comprise a first end face (101) and a second end face (102) which are opposite to each other on the battery module (100); the explosion-proof valve comprises a first explosion-proof valve (131) arranged on the first end face (101) and a second explosion-proof valve (132) arranged on the second end face (102);

the liquid cooling plate comprises a first guide flue cooling plate (110) and a second guide flue cooling plate (140), the first guide flue cooling plate (110) is arranged on one side of the first end face (101) of the battery module (100), and a first flue (160) for covering the first explosion-proof valve (131) is enclosed between the first guide flue cooling plate (110) and the first end face (101); the second guide flue cold plate (140) is arranged on one side of the second end face (102) of the battery module (100), and a second flue (170) for covering the second explosion-proof valve (132) is enclosed between the second guide flue cold plate (140) and the second end face (102);

the first flue (160) and the second flue (170) are respectively used for communicating with an exhaust channel (220) on the battery pack shell (210).

3. The battery module liquid cooling panel thermal runaway exhaust stack structure of claim 2, wherein:

the number of the battery modules (100) is a plurality, the battery modules (100) are arranged side by side, and the first end face (101) of any two adjacent battery modules (100) is adjacent to the second end face (102);

the number of the first guide flue cold plates (110) is a plurality, and the number of the second guide flue cold plates (140) is a plurality; the first guide flue cold plate (110) and the second guide flue cold plate (140) are arranged between any two adjacent battery modules (100) to form the first flue (160) and the second flue (170).

4. The battery module liquid cooling plate thermal runaway exhaust stack structure according to claim 3, wherein:

the two ends of the first flue (160) are arranged in an open mode, and the two ends of the first flue (160) are respectively communicated with an exhaust channel (220) on the battery pack shell (210);

the two ends of the second flue (170) are arranged in an open mode, and the two ends of the second flue (170) are respectively communicated with an exhaust channel (220) on the battery pack shell (210).

5. The battery module liquid cooling panel thermal runaway vent stack structure of any one of claims 1-4, wherein:

the liquid cooling plates comprise a first cold plate (111), a second cold plate (112) and a third cold plate (113) which are connected in sequence and are arranged at an included angle; the first cold plate (111) and the third cold plate (113) are located on the same side of the second cold plate (112), and the first cold plate (111), the second cold plate (112), the third cold plate (113) and the end face enclose the guide flue.

6. The battery module liquid cooling plate thermal runaway exhaust stack structure according to claim 5, wherein:

the liquid cooling plate further comprises a fourth cooling plate (114); the first cold plate (111), the second cold plate (112), the third cold plate (113) and the fourth cold plate (114) are connected in sequence, the fourth cold plate (114) and the third cold plate (113) are arranged at an included angle, and the fourth cold plate (114) and the end face are fixed.

7. The battery module liquid cooling panel thermal runaway exhaust stack structure of claim 6, wherein:

the first cold plate (111), the second cold plate (112), the third cold plate (113) and the fourth cold plate (114) together provide the circulation flow channel; the water inlet (141) and the water outlet (142) are respectively arranged at two ends of the third cold plate (113).

8. The battery module liquid cooling panel thermal runaway exhaust stack structure of claim 6, wherein:

the battery module liquid cooling plate thermal runaway exhaust flue structure further comprises a heat conducting structure, and the heat conducting structure is arranged between the fourth cooling plate (114) and the end face.

9. A battery pack (200), characterized by:

the battery pack (200) comprising a battery pack housing (210) and the battery module liquid cooling panel thermal runaway vent stack structure of any one of claims 1-8; the battery pack housing (210) is provided with an exhaust passage (220), and the guide flue communicates with the exhaust passage (220).

10. The battery pack (200) according to claim 9, wherein:

the number of the exhaust channels (220) is two, the two exhaust channels (220) are respectively arranged on two opposite side walls of the battery pack shell (210), and two ends of the guide flue are respectively communicated with the two exhaust channels (220).