CN216085034U

CN216085034U - Battery module and battery

Info

Publication number: CN216085034U
Application number: CN202122303683.6U
Authority: CN
Inventors: 邢志斌; 陈保国; 彭月猛
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-03-18
Anticipated expiration: 2031-09-23

Abstract

The utility model relates to the technical field of batteries, and discloses a battery module and a battery, wherein the battery module comprises: at least two cell units comprising at least one cell; the liquid cooling plate isolation wall is clamped between every two adjacent electric core units; and the integrated liquid cooling plate is at least two, the battery cell in the battery cell unit is attached to the integrated liquid cooling plate, and cooling liquid is circularly introduced into the integrated liquid cooling plate and the liquid cooling plate isolation wall. Through above-mentioned structure, this battery module can block thermal runaway's propagation, is favorable to improving the security.

Description

Battery module and battery

Technical Field

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

Background

The thermal runaway refers to the phenomena of overheating, ignition and explosion of the battery caused by the rapid change of the self-temperature rise rate of the battery due to the battery exothermic chain reaction. Thermal runaway can also cause thermal runaway expansion, so that thermal runaway phenomena of batteries adjacent to or at other parts in a battery system can cause a large amount of thermal runaway of the batteries, a large amount of energy is released, and fire, explosion and personal and property safety hazard are easily caused.

The propagation of thermal runaway has two factors, one is that high-temperature gas sprayed by the thermal runaway impacts other battery cells, and the other is that the high temperature of the battery cell after the thermal runaway is transmitted to an adjacent battery cell through heat conduction. In the prior art, a method for preventing thermal runaway generally includes disposing a heat insulating material or a phase change heat absorbing material between the cells to prevent the thermal runaway heat from being transmitted to the cells that are not runaway through heat conduction. However, in this method, since heat is not taken away, only propagation of thermal runaway can be slowed down, and the purpose of blocking cannot be achieved, and the heat insulating material needs to be thick, occupies a large space, and reduces the space utilization rate of the battery module.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a battery module capable of blocking propagation of thermal runaway, which is advantageous for improving safety.

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

a battery module, comprising:

at least two cell units comprising at least one cell;

the liquid cooling plate isolation wall is clamped between every two adjacent electric core units;

and the integrated liquid cooling plate is at least two, the battery cell in the battery cell unit is attached to the integrated liquid cooling plate, and cooling liquid is circularly introduced into the integrated liquid cooling plate and the liquid cooling plate isolation wall.

As an optimal scheme of a battery module, a liquid inlet pipeline and a liquid outlet pipeline are arranged on the liquid cooling plate isolation wall, a liquid inlet and a liquid outlet are formed in the integrated liquid cooling plate, the liquid inlet pipeline is communicated with the integrated liquid cooling plate to achieve communication with the liquid inlet, and the liquid outlet pipeline is communicated with the integrated liquid cooling plate to achieve communication with the liquid outlet.

As the preferred scheme of a battery module, the liquid cooling plate separation wall comprises an inner liquid cooling plate and two heat insulation layers, and the inner liquid cooling plate is clamped between the two heat insulation layers.

As an optimal scheme of the battery module, an inner connection inlet and an inner connection outlet are formed in the integrated liquid cooling plate, the integrated liquid cooling plate is communicated with the liquid inlet pipeline through the inner connection outlet, and the integrated liquid cooling plate is communicated with the liquid outlet pipeline through the inner connection inlet.

As a preferred scheme of a battery module, be equipped with on the interior liquid cooling board and connect import and connect the export, connect the import with feed liquor pipeline intercommunication, connect the export with the drain pipe intercommunication.

As a preferred scheme of battery module, the insulating layer adopts one of aerogel, mica sheet, vacuum plate, asbestos to make.

As an optimal scheme of the battery module, the battery module further comprises a heat conduction layer, wherein the heat conduction layer is arranged on the side surface of the integrated liquid cooling plate, and the heat conduction layer is clamped between the integrated liquid cooling plate and the battery core.

As a preferred scheme of the battery module, a buffer layer is clamped between two adjacent battery cores in the battery core unit.

As a preferable scheme of the battery module, the buffer layer is a foam piece.

Another object of the present invention is to provide a battery having high safety.

a battery comprises the battery module provided by any one of the technical schemes.

The utility model has the beneficial effects that:

the utility model provides a battery module which comprises an integrated liquid cooling plate, a liquid cooling plate isolation wall and at least two battery cell units, wherein cooling liquid is circularly introduced into the integrated liquid cooling plate and the liquid cooling plate isolation wall, each battery cell unit comprises at least one battery cell which is used as an electric storage part in a battery, the liquid cooling plate isolation wall is clamped between every two adjacent battery cell units and used for isolating the two adjacent battery cell units and slowing down the heat transfer between the two adjacent battery cell units, the battery cells in the at least two battery cell units are attached to the integrated liquid cooling plate, the heat generated by the battery cells can be transferred to the integrated liquid cooling plate and taken away by the cooling liquid, and therefore the battery module can work in a proper temperature range. In addition, when the electric core in the electric core unit takes place the thermal runaway, the heat that the thermal runaway produced can be slowed down to adjacent electric core unit diffusion by the liquid cooling board division wall to take away by the coolant liquid in the liquid cooling board division wall, show the holistic security of battery module.

The utility model provides a battery, which comprises the battery module provided by the technical scheme. Because the battery comprises the battery module provided by the technical scheme, the battery has higher safety.

Drawings

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

fig. 2 is a schematic structural view of a liquid cooling plate partition wall of a battery module according to an embodiment of the present invention;

fig. 3 is an enlarged view at a in fig. 1.

In the figure:

1. an electric core; 2. a liquid-cooled panel separation wall; 21. a liquid inlet pipeline; 22. a liquid outlet pipeline; 23. an internal liquid cooling plate; 231. connecting the inlet; 232. connecting the outlet; 24. a thermal insulation layer; 3. an integrated liquid-cooled plate; 31. a liquid inlet; 32. a liquid outlet; 33. the inner part is connected with an inlet; 34. an inner connection outlet; 4. a heat conductive layer; 5. a buffer layer.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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, removably 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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.

The technical scheme of the battery module and the battery provided by the utility model is further described by the specific embodiment with reference to the attached drawings.

The embodiment provides a battery module, as shown in fig. 1, this battery module includes integrated liquid cooling plate 3, liquid cooling plate isolation wall 2 and two at least electric core units, the circulation leads to the coolant liquid in integrated liquid cooling plate 3, electric core unit includes at least one electric core 1, electric core 1 plays a role as the partial performance of electric power storage in the battery, it has liquid cooling plate isolation wall 2 to press from both sides between two adjacent electric core units, liquid cooling plate isolation wall 2 is used for keeping apart two adjacent electric core units, slow down the transmission of heat between two electric core units, all electric core 1 in two at least electric core units all with integrated liquid cooling plate 3 laminating contact, make the heat that electric core 1 produced can transmit to integrated liquid cooling plate 3 in be taken away by the coolant liquid, thereby make this battery module work in suitable temperature interval.

Preferably, the integrated liquid cooling plate 3 is in contact with the side surfaces of all the battery cells 1 in at least two battery cell units in a fitting manner, so that the heat generated by all the battery cells 1 can be transferred to the integrated liquid cooling plate 3, and each battery cell 1 can be cooled down conveniently. Further, this battery module still includes heat-conducting layer 4, and heat-conducting layer 4 sets up on integrated liquid-cooled board 3's side, and heat-conducting layer 4 presss from both sides and locates between integrated liquid-cooled board 3 and electric core 1, and heat-conducting layer 4 can reduce the thermal resistance as interface material, gives integrated liquid-cooled board 3 with electric core 1's heat fast transfer. Specifically, the heat conduction layer 4 is formed by heat conduction glue filled between the integrated liquid-cooled plate 3 and the battery cell 1, and can quickly transfer heat of the battery cell 1 to the integrated liquid-cooled plate 3.

In this embodiment, the coolant liquid is let in to circulation in the liquid cooling board division wall 2 for when electric core 1 in the electric core unit takes place the thermal runaway, the heat that the thermal runaway produced can also be absorbed and taken away by the coolant liquid in the liquid cooling board division wall 2 except can being slowed down to adjacent electric core unit diffusion by the separation of liquid cooling board division wall 2, has effectively avoided other electric core units to take place the thermal runaway because of being heated in the battery module, is showing and is improving the holistic security of this battery module.

Preferably, be equipped with into liquid pipeline 21 and drain pipe 22 on the liquid cooling board division wall 2, be equipped with inlet 31 and liquid outlet 32 on the integrated liquid cooling board 3, liquid inlet 21 communicates in integrated liquid cooling board 3 in order to realize communicating with inlet 31, drain pipe 22 communicates in integrated liquid cooling board 3 in order to realize communicating with liquid outlet 32, and inlet 31 is used for letting in the coolant liquid, and liquid outlet 32 is used for discharging the coolant liquid. After the cooling liquid introduced into the integrated liquid cooling plate 3 from the liquid inlet 31 flows into the integrated liquid cooling plate 3, a part of the cooling liquid exchanges heat with the battery cell 1 in the integrated liquid cooling plate 3, and the other part of the cooling liquid flows through the liquid inlet pipeline 21 and enters the liquid cooling plate partition wall 2 to play a role, and the cooling liquid entering the liquid cooling plate partition wall 2 flows through the liquid outlet pipeline 22 and then returns to the integrated liquid cooling plate 3 again and flows out from the liquid outlet 32 together with the cooling liquid in the integrated liquid cooling plate 3.

Preferably, the integrated liquid-cooled plate 3 is provided with an internal connection inlet 33 and an internal connection outlet 34, the integrated liquid-cooled plate 3 is communicated with the liquid inlet pipeline 21 through the internal connection outlet 34, and the integrated liquid-cooled plate 3 is communicated with the liquid outlet pipeline 22 through the internal connection inlet 33, so that the cooling liquid in the integrated liquid-cooled plate 3 can enter the liquid-cooled plate partition wall 2 and flow back to the integrated liquid-cooled plate 3 from the liquid-cooled plate partition wall 2. Further, as shown in fig. 2, the liquid cooling plate partition wall 2 is provided with a connection inlet 231 and a connection outlet 232, the connection inlet 231 is communicated with the liquid inlet pipeline 21, and the connection outlet 232 is communicated with the liquid outlet pipeline 22, so that the liquid inlet pipeline 21 and the liquid outlet pipeline 22 are conveniently connected with the inner liquid cooling plate 23.

In this embodiment, the liquid cooling plate separation wall 2 includes an inner liquid cooling plate 23 and two heat insulation layers 24, the inner liquid cooling plate 23 is sandwiched between the two heat insulation layers 24, and the heat insulation layers 24 enable the liquid cooling plate separation wall 2 to have heat insulation capability, which helps to slow down heat diffusion to adjacent cell units; the connection inlet 231 and the connection outlet 232 are disposed on the inner liquid-cooling plate 23, so that the cooling liquid circulates in the inner liquid-cooling plate 23.

Specifically, the thermal insulation layer 24 is made of one of aerogel, mica sheet, vacuum plate and asbestos, that is, the thermal insulation layer 24 is one of aerogel layer, mica sheet layer, vacuum plate layer and asbestos layer, so that the thermal insulation layer 24 has a good thermal insulation effect, and helps to slow down the diffusion of heat from the battery cell unit to the adjacent battery cell unit.

In this embodiment, as shown in fig. 3, the battery module further includes a buffer layer 5, the buffer layer 5 is sandwiched between two adjacent battery cells 1 in the battery cell unit, and the buffer layer 5 can absorb the expansion of the battery cells 1, which is helpful for improving the structural stability of the battery module. Preferably, the cushioning layer 5 is a foam piece, that is, the cushioning layer 5 is made of foam, so that the cushioning layer 5 has certain compressibility and rigidity.

Specifically, one cell unit in the present embodiment is formed by stacking six cells 1, and two buffer layers 5 are disposed in the cell unit to absorb swelling of the cells 1. Liquid cooling plate isolation walls 2 are clamped between every two adjacent battery cell units, and four battery cell units and three liquid cooling plate isolation walls 2 are arranged in one battery module. If a battery cell 1 is out of thermal runaway, because there is no device for inhibiting thermal runaway in the battery cell unit, other five battery cells 1 in the same battery cell unit are out of thermal runaway one after another, but because of the existence of the liquid-cooled plate separation wall 2, the thermal runaway can be blocked and can not be propagated to other battery cell units.

The embodiment also provides a battery, which comprises the battery module provided by the technical scheme. Because the battery comprises the battery module provided by the technical scheme, the battery has higher safety.

It should 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, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the utility model. 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.

It is noted that throughout the description herein, references to the description of "some embodiments," "other embodiments," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A battery module, comprising:

at least two cell units comprising at least one cell (1);

the liquid cooling plate separation wall (2) is clamped between every two adjacent battery cell units;

the battery cell unit comprises integrated liquid cooling plates (3), wherein the battery cells (1) in the battery cell units are attached to the integrated liquid cooling plates (3), and cooling liquid is introduced into the integrated liquid cooling plates (3) and the liquid cooling plate isolation wall (2) in a circulating mode.

2. The battery module according to claim 1, wherein a liquid inlet pipeline (21) and a liquid outlet pipeline (22) are arranged on the liquid cooling plate partition wall (2), a liquid inlet (31) and a liquid outlet (32) are arranged on the integrated liquid cooling plate (3), the liquid inlet pipeline (21) is communicated with the integrated liquid cooling plate (3) to communicate with the liquid inlet (31), and the liquid outlet pipeline (22) is communicated with the integrated liquid cooling plate (3) to communicate with the liquid outlet (32).

3. The battery module according to claim 2, wherein the liquid-cooled panel partition wall (2) comprises an inner liquid-cooled panel (23) and two heat insulating layers (24), the inner liquid-cooled panel (23) being sandwiched between the two heat insulating layers (24).

4. The battery module according to claim 2, wherein the integrated liquid cooling plate (3) is provided with an internal connection inlet (33) and an internal connection outlet (34), the integrated liquid cooling plate (3) is communicated with the liquid inlet pipeline (21) through the internal connection outlet (34), and the integrated liquid cooling plate (3) is communicated with the liquid outlet pipeline (22) through the internal connection inlet (33).

5. The battery module according to claim 3, wherein the inner liquid cooling plate (23) is provided with a connection inlet (231) and a connection outlet (232), the connection inlet (231) is communicated with the liquid inlet pipeline (21), and the connection outlet (232) is communicated with the liquid outlet pipeline (22).

6. The battery module according to claim 3, wherein the thermal insulation layer (24) is made of one of aerogel, mica sheet, vacuum plate, and asbestos.

7. The battery module according to claim 1, characterized in that the battery module further comprises a heat conducting layer (4), the heat conducting layer (4) is arranged on the side of the integrated liquid-cooled plate (3), and the heat conducting layer (4) is sandwiched between the integrated liquid-cooled plate (3) and the battery core (1).

8. The battery module according to claim 1, wherein a buffer layer (5) is sandwiched between two adjacent battery cells (1) in the battery cell units.

9. The battery module according to claim 8, wherein the buffer layer (5) is a foam.

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