CN214898726U

CN214898726U - Battery system and car

Info

Publication number: CN214898726U
Application number: CN202120090815.9U
Authority: CN
Inventors: 马可; 海舟; 康振华; 李晓蕾
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-11-26
Anticipated expiration: 2031-01-13

Abstract

The utility model is suitable for a battery package protection technology field provides a battery system and car, and battery system includes casing, baffle, battery module, feed liquor pipeline, temperature sensor and controller. The partition plate divides the accommodating space into a first chamber and a second chamber; the battery module is arranged in the second cavity, and the leading-out end of the battery module extends into the first cavity; the liquid inlet pipeline extends into the first chamber, and a liquid cooling valve is arranged on the liquid inlet pipeline; the temperature sensor is arranged in the first cavity to sense the eruption object; the controller is respectively in communication connection with the temperature sensor and the liquid cooling valve. The utility model provides a battery system, spun eruption thing when first cavity can hold battery module thermal runaway has reduced the influence to other modules, and eruption thing's heat can in time trigger temperature sensor to give the controller with temperature signal transmission, open with control liquid cooling valve, in the coolant liquid can spill over the baffle and get into the second cavity, thereby cool down thermal runaway's module.

Description

Battery system and car

Technical Field

The utility model belongs to the technical field of the battery package protection, more specifically say, relate to a battery system and car.

Background

At present, the safety requirement on batteries in the field of new energy automobiles is higher and higher, and a thermal runaway experiment is brought into a mandatory requirement by a new national standard. Lithium ion battery can make electrolyte evaporation and produce combustible mixture at the thermal runaway in-process to the gathering is in the inside of battery, after the battery is inside to reach certain pressure limit, can open the explosion-proof point of battery, and combustible mixture erupts and releases in the external environment along with the explosion-proof point of battery. The high-temperature combustible material after the battery erupts contacts with the air entering the battery, the spontaneous combustion phenomenon is easy to occur, and the harm is large.

At present, the battery pack adopts a mode of adding heat insulating materials such as mica plates or aerogels between modules, can delay and inhibit the spread of thermal runaway to a certain extent, but can not effectively and timely isolate high-temperature combustible generated by the thermal runaway module, and extinguishes fire in the pack.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a battery system and car to solve current battery package and can't effectively in time completely cut off the technical problem of high temperature combustible material when thermal runaway.

In order to achieve the above object, the utility model adopts the following technical scheme: provided is a battery system including:

a housing having an accommodating space therein;

the partition plate is arranged in the accommodating space and is used for dividing the accommodating space into a first chamber and a second chamber;

the battery module is arranged in the second cavity, and the leading-out end of the battery module extends into the first cavity;

the liquid inlet pipeline is arranged on the outer side of the shell and extends into the first cavity, and a liquid cooling valve used for controlling the on-off of the liquid inlet pipeline is arranged on the liquid inlet pipeline;

the temperature sensor is arranged on the inner wall of the shell and arranged in the first cavity and used for sensing eruptions of the battery module; and

and the controller is in communication connection with the temperature sensor and the liquid cooling valve respectively.

Through adopting above-mentioned technical scheme, divide into first cavity and second cavity with accommodation space through the baffle, place the battery module in the second cavity, spun eruption thing when first cavity can hold battery module thermal runaway, the influence to other modules has been reduced, secondly the heat that eruption thing brought can in time trigger temperature sensor, this temperature sensor gives the controller with temperature signal transmission, the controller can be opened according to temperature signal control liquid cooling valve, the coolant liquid can spill over in the baffle gets into the second cavity, thereby cool down to thermal runaway's module.

Optionally, the battery system further comprises:

and the liquid level sensor is arranged on the inner wall of the shell and arranged in the first cavity, and the liquid level sensor is in communication connection with the controller.

Through adopting above-mentioned technical scheme, through setting up level sensor, can hold the maximum allowable height of coolant liquid according to the cavity, can give the controller with signal transmission, this controller control inlet channel closes to make the coolant liquid no longer get into in the first cavity through inlet channel.

Optionally, the liquid level sensor is located on a side wall of the housing, and the liquid level sensor is located at a height level with a height of the partition plate, which is lower than the height of the housing.

Through adopting above-mentioned technical scheme, when filling up water in first cavity and the second cavity, the height of the liquid level at coolant liquid place is unanimous with the height of baffle, and level sensor is triggered to the coolant liquid this moment, and level sensor gives the controller with the signal transmission and closes in order to control liquid-cooled valve.

Optionally, the height of the separator, which is a plate-shaped structure made of a heat insulating material, is lower than that of the battery module.

Through adopting above-mentioned technical scheme, because when battery module thermal runaway, the explosion-proof point of battery module can be washed away at first to erupt the thing, highly sets up to the height that is less than the battery module through with the baffle for in the thing can the directional eruption to first cavity of erupting, the baffle that adopts thermal insulation material to make can completely cut off the temperature of battery eruption thing, avoids the battery module to receive high temperature and influences.

Optionally, the number of baffles is one; or the number of the partition plates is two, so that two first chambers are formed, and the two first chambers are respectively arranged on two sides of the second chamber.

By adopting the technical scheme, when the number of the partition plates is one, the number of the first cavities is one, so that the positive and negative lugs of the battery module can be led out conveniently at the same side; when the number of the partition plates is two, the first cavity is respectively arranged at two sides of the second cavity, so that the positive and negative electrode lugs of the battery module can be led out from different sides conveniently.

Optionally, the number of the shells is a plurality of, and the shells are arranged side by side, the number of the battery modules is a plurality of, a plurality of the shells are provided with the battery modules in a one-to-one correspondence, and the adjacent battery modules are electrically connected.

Through adopting above-mentioned technical scheme, separate a plurality of battery module through the casing, avoided battery module that thermal runaway to influence battery module not out of control.

Optionally, a through hole is formed in the side wall of the first cavity, which is away from the second cavity, and the leading-out end of the battery module extends out of the through hole.

Through adopting above-mentioned technical scheme, stretch out the through-hole with battery module's the end of drawing forth, be convenient for form the electricity between a plurality of battery modules and connect.

Optionally, the housing comprises:

the temperature sensor is arranged on the bottom plate, the first cavity and the second cavity are arranged along the length direction of the bottom plate, and a liquid inlet communicated with the liquid inlet pipeline is formed in the part of the bottom plate corresponding to the first cavity; and

and the side plates are arranged on the side edges of the bottom plate and form an accommodating space with the bottom plate in an enclosing manner.

Through adopting above-mentioned technical scheme, set up temperature sensor on the bottom plate, be convenient for respond to the eruption thing of battery module, set up the baffle along the length direction of bottom plate, the position of the explosion-proof point of the battery module of being convenient for corresponds the baffle setting, and the inlet is convenient for the feed liquor pipeline and is stretched into in the accommodation space.

Optionally, the housing further comprises:

and the cover plate is arranged on the side plate and is used for sealing the first cavity or sealing the first cavity and the second cavity.

Through adopting above-mentioned technical scheme, the apron is used for the first cavity of closing cap, perhaps, the apron is used for first cavity of closing cap and second cavity, avoids eruption thing blowout external environment in, influences other battery module.

The utility model also provides a car, including foretell battery system, the coolant liquid container and the feed liquor pipeline intercommunication of car.

The utility model provides a beneficial effect of car lies in: through adopting foretell battery system, divide into first cavity and second cavity with accommodation space through the baffle, place the battery module in the second cavity, spun eruption thing when first cavity can hold battery module thermal runaway, the influence to other modules has been reduced, secondly the heat that eruption thing brought can in time trigger temperature sensor, this temperature sensor gives the controller with temperature signal transmission, the controller can be opened according to temperature signal control liquid cooling valve, the coolant liquid can spill over in the baffle gets into the second cavity, thereby cool down to thermal runaway's module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic perspective view of a housing and a partition provided in an embodiment of the present invention;

fig. 2 is a schematic top view of a housing and a partition according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

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

Wherein, in the figures, the respective reference numerals:

1-a shell; 10-a containment space; 101-a first chamber; 102-a second chamber; 11-a base plate; 111-a liquid inlet; 12-side plates; 121-a through hole; 13-a cover plate; 2-a separator; 3-a battery module; 4-a liquid inlet pipeline; 41-liquid cooling valves; 5-a temperature sensor; 6-a controller; 7-liquid level sensor.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

Referring to fig. 1 to fig. 3, a battery system according to an embodiment of the present invention will be described. The battery system is suitable for VDA (Verband der Automobilindriesis, Germany automobile industry Association) modules, and of course, can also be suitable for battery modules of other standard models.

Specifically, with further reference to fig. 1 to 4, the battery system in the present embodiment includes a case 1, a separator 2, a battery module 3, a liquid inlet duct 4, a temperature sensor 5, and a controller 6. Wherein, the housing 1 is internally provided with an accommodating space 10; the partition 2 is disposed in the accommodating space 10 for dividing the accommodating space 10 into a first chamber 101 and a second chamber 102; the battery module 3 is arranged in the second chamber 102, and the leading-out end of the battery module 3 extends into the first chamber 101; the liquid inlet pipeline 4 is arranged on the outer side of the shell 1 and extends into the first chamber 101, and a liquid cooling valve 41 for controlling the on-off of the liquid inlet pipeline 4 is arranged on the liquid inlet pipeline 4; the temperature sensor 5 is mounted on the inner wall of the shell 1 and arranged in the first chamber 101, and the temperature sensor 5 is used for sensing the eruption of the battery module 3; the controller 6 is respectively connected with the temperature sensor 5 and the liquid cooling valve 41 in a communication way.

It should be noted that, the battery module 3 generally includes a battery core disposed in a housing and an enclosure, wherein the explosion-proof point of the battery module 3 is located on one side of the led-out copper bar of the battery module 3, and the led-out end of the battery module 3 extends into the first chamber 101, so that the explosion-proof point of the battery module 3 is disposed corresponding to the first chamber 101. Referring further to fig. 4, when thermal runaway of the battery module 3 occurs, the eruption may first break through the explosion-proof point of the battery module 3, and then fall into the first chamber 101, i.e., the eruption may be directionally erupted into the first chamber 101. Wherein, partial eruption thing falls on temperature sensor 5's position, and temperature sensor 5 can be triggered to the heat that the eruption thing brought, and temperature signal transmission that this temperature sensor 5 will sense is for controller 6, and controller 6 opens according to temperature signal control liquid cooling valve 41 to can make in the coolant liquid gets into first cavity, and spill over first cavity 101, cool down battery module 3 in the second cavity 102.

The utility model provides a battery system, compared with the prior art, cut apart into first cavity 101 and second cavity 102 with accommodation space 10 through baffle 2, place battery module 3 in second cavity 102, spun eruption object when first cavity 101 can hold battery module 3 thermal runaway, the influence to other battery modules 3 has been reduced, avoid causing thermal runaway's chain reaction, secondly the heat that eruption object brought can in time trigger temperature sensor 5, this temperature sensor 5 transmits temperature signal for controller 6, controller 6 can be opened according to temperature signal control liquid cooling valve 41, the coolant liquid can overflow baffle 2 and get into in the second cavity 102, thereby cool down thermal runaway's module, can greatly restrain and slow down stretching of battery module 3 thermal runaway, reach the effect of putting out a fire even.

It should be noted that the number of the first chambers 101 is designed according to whether the positive and negative electrodes of the battery module 3 are led out from the same side, and when the positive and negative electrodes of the battery module 3 are led out from the same side, the number of the first chambers 101 may be set to be one, that is, the number of the separators 2 is one. It can be understood that when the positive and negative opposite sides of the battery module 3 are drawn out, the number of the first chambers 101 is two, and the two first chambers 101 are respectively located at two sides of the battery module 3, that is, the number of the separators 2 is two, so as to form two first chambers 101, and the two first chambers 101 are respectively located at two sides of the second chamber 102.

Further, with reference to fig. 3 and 4, the battery system further includes a liquid level sensor 7, the liquid level sensor 7 is mounted on the inner wall of the housing 1 and disposed in the first chamber 101, and the liquid level sensor 7 is in communication connection with the controller 6. The liquid level sensor 7 is a pressure sensor for measuring liquid level, and mainly converts static pressure into an electric signal based on the principle that the static pressure of the measured liquid is proportional to the height of the liquid, and then converts the electric signal into a standard electric signal through temperature compensation and linear correction so as to transmit the standard electric signal to the controller 6.

Specifically, the position of the liquid level sensor 7 is set according to the maximum allowable height of the cooling liquid which can be contained in the containing space 10, when the cooling liquid overflows from the partition plate 2 between the first chamber 101 and the second chamber 102 and enters the second chamber 102, the second chamber 102 where the thermal runaway battery module 3 is located is filled with the cooling liquid, along with the continuous rising of the liquid level, until the liquid level of the cooling liquid triggers the liquid level sensor 7 in the first chamber 101, the liquid level sensor 7 transmits a signal to the controller 6, the controller 6 controls the liquid cooling valve 41 to be closed according to the liquid level signal, the cooling liquid does not enter the first chamber 101 through the liquid inlet pipeline 4, and the situation that the cooling liquid overflows from the casing 1 and affects the normal work of other battery modules 3 is avoided.

Preferably, the level sensor 7 is located on the side wall of the housing 1, and the level sensor 7 is located at a height level with the height of the partition 2, and the height of the partition 2 is lower than the height of the housing 1. When filling up water in first cavity 101 and the second cavity 102, the height of the liquid level at coolant liquid place and the high parallel and level of baffle 2, coolant liquid this moment triggers level sensor 7, and level sensor 7 closes with control liquid cooling valve 41 with signal transmission for controller 6, has avoided the coolant liquid to spill over casing 1 and influence other battery module 3's normal work.

Further, referring to fig. 3 and 4, in order to allow the first chamber 101 to directionally accommodate the eruption when the module is out of control due to thermal runaway, and reduce the influence on other modules, the height of the partition board 2 is lower than that of the battery module 3, so that the eruption can be erupted into the first chamber 101 when the battery module 3 is out of control due to thermal runaway, and the temperature sensor 5 in the first chamber 101 can be triggered. And the partition board 2 is a plate-shaped structure made of heat insulation materials, and the heat insulation materials can be hollow heat insulation boards or heat insulation cotton adhered on the surface of the plate-shaped element or aerogel pads adhered on the surface of the plate-shaped element, so that the partition board 2 can insulate the temperature of eruption of the battery module 3, and the danger that other battery modules 3 which are not out of control are subjected to high temperature is avoided.

In order to further avoid influencing other battery modules 3 which are not out of control, the inner wall of the shell 1 can be coated with a heat insulating material or a hollow plate is adopted, so that the influence on other battery modules 3 which are not out of control is further avoided, and the high-temperature transmission of eruption is avoided.

Further, in this embodiment, the quantity of casing 1 is a plurality of and sets up side by side, and the quantity of battery module 3 is a plurality of, and a plurality of 1 one-to-ones of casing are provided with battery module 3, are provided with a battery module 3 in casing 1 promptly, when avoiding a battery module 3 to take place the thermal runaway, influence other battery module 3 that do not run away, and then take place chain reaction, and adjacent battery module 3 electricity is connected.

In an embodiment of the present invention, referring to fig. 1 and fig. 3, a through hole 121 is opened on a side wall of the first chamber 101 away from the second chamber 102, and the through hole 121 runs through an inner side wall and an outer side wall of the housing 1, so that a leading-out end of the battery module 3 extends out of the through hole 121 and exposes an outer side of the housing 1. The leading-out ends of the battery modules 3 extend out of the shell 1, so that the leading-out ends of the battery modules 3 can be conveniently and electrically connected with the leading-out ends of other battery modules 3.

Further, referring specifically to fig. 1, 3 and 4, the housing 1 includes a bottom plate 11 and a plurality of side plates 12. The temperature sensor 5 is arranged on the bottom plate 11, the bottom plate 11 is a long strip plate, the first cavity 101 and the second cavity 102 are arranged along the length direction of the bottom plate 11, and a liquid inlet 111 communicated with the liquid inlet pipeline 4 is formed in the part of the bottom plate 11 corresponding to the first cavity 101; the side plates 12 are disposed at the side of the bottom plate 11 and surround the bottom plate 11 to form an accommodating space 10.

Specifically, the number of the side plates 12 is four, and the four side plates 12 are respectively and correspondingly disposed on the side edges of the bottom plate 11 and connected with the bottom plate 11 to form the accommodating space 10. The temperature sensor 5 is arranged on the bottom plate 11, so that the thermal runaway eruption of the battery module 3 can be conveniently induced; set up baffle 2 along the length direction of bottom plate 11, the position of the explosion-proof point of the battery module 3 of being convenient for corresponds the setting of baffle 2, and inlet 111 is convenient for inlet pipe 4 and is stretched into in accommodation space 10.

Specifically, in the present embodiment, the housing 1 further includes a cover plate 13, and the cover plate 13 is disposed on the side plate 12 and is used for covering the first chamber 101 or for covering the first chamber 101 and the second chamber 102. The upper surface of casing 1 can select partly to seal or totally closed design according to actual need promptly, with the first cavity 101 of apron 13 closing cap for the upper surface part of casing 1 is closed, avoids the eruption thing to spill over outside casing 1, is convenient for get simultaneously and puts battery module 3. The cover 13 covers the first chamber 101 and the second chamber 102 so that the upper surface of the housing 1 is completely closed, completely preventing the spray from overflowing the housing 1.

The utility model also provides an automobile, including the battery system in the above-mentioned arbitrary embodiment, coolant liquid container and the liquid inlet pipe way 4 intercommunication in this automobile are convenient for carry the coolant liquid in to first cavity 101.

The car that this embodiment provided, through adopting the battery system in above-mentioned arbitrary embodiment, spun eruption thing can be avoided when battery module 3 thermal runaway to the influence of other modules, and simultaneously, the heat that eruption thing produced can in time trigger temperature sensor 5, and give controller 6 with temperature signal transmission, controller 6 can be opened according to temperature signal control liquid cooling valve 41, and the coolant liquid can overflow baffle 2 and get into in the second chamber 102, and lower the temperature to thermal runaway's module.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A battery system, comprising:

a housing having an accommodating space therein;

the battery module is arranged in the second cavity, and a leading-out end of the battery module extends into the first cavity;

the temperature sensor is arranged on the inner wall of the shell and arranged in the first cavity, and is used for sensing eruptions of the battery module; and

2. The battery system of claim 1, further comprising:

the liquid level sensor is installed on the inner wall of the shell and arranged in the first cavity, and the liquid level sensor is in communication connection with the controller.

3. The battery system of claim 2, wherein the level sensor is located on a side wall of the housing at a height that is flush with a height of the partition, the partition having a height that is lower than a height of the housing.

4. The battery system according to any one of claims 1 to 3, wherein the height of the separator is lower than the height of the battery module; the partition plate is a plate-shaped structure made of heat insulating materials.

5. The battery system according to any one of claims 1 to 3, wherein the number of the separators is one; or the number of the partition plates is two, so that two first chambers are formed, and the two first chambers are respectively arranged on two sides of the second chamber.

6. The battery system according to any one of claims 1 to 3, wherein the number of the housings is plural and the housings are arranged side by side, the number of the battery modules is plural, the plurality of the housings are provided with the battery modules in one-to-one correspondence, and the adjacent battery modules are electrically connected.

7. The battery system of claim 6, wherein a through hole is formed in a side wall of the first cavity facing away from the second cavity, and the leading end of the battery module extends out of the through hole.

8. The battery system of any of claims 1-3, wherein the housing comprises:

and the side plates are arranged on the side edges of the bottom plate and form the accommodating space with the bottom plate in an enclosing manner.

9. The battery system of claim 8, wherein the housing further comprises:

and the cover plate is arranged on the side plate and is used for covering the first cavity or the first cavity and the second cavity.

10. An automobile, characterized in that: comprising a battery system according to any one of claims 1 to 9, the coolant container of the vehicle being in communication with the inlet conduit.