CN210110990U

CN210110990U - Direct current quick charging liquid cooling battery system

Info

Publication number: CN210110990U
Application number: CN201920848755.5U
Authority: CN
Inventors: 肖喆; 胡尔生
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-02-21
Anticipated expiration: 2029-06-05

Abstract

The utility model relates to a direct current fills liquid cooling battery system soon. The battery system includes the battery and with the liquid cooling system that the battery thermal conductance connects, the battery includes the battery box, sets up electric core module in the battery box, set up on the diapire of battery box and with at least one liquid cooling board that the position of electric core module corresponds, respectively with each coolant liquid pipeline, cladding of liquid cooling board intercommunication in the outer heat preservation cotton of coolant liquid pipeline and the packing set up in the cavernosum in electric core module space, the cavernosum adsorbs insulating liquid. The technical scheme of the utility model can guarantee the performance and the life-span of battery.

Description

Direct current quick charging liquid cooling battery system

Technical Field

The utility model relates to an automobile battery technical field, concretely relates to direct current fills liquid cooling battery system soon.

Background

The battery is the most central component of the electric automobile, and the working temperature of the battery has very important influence on the performance and the service life of the battery. Especially, the demand of the electric vehicle for the charging time and the charging current is higher and higher at present, which means that the heat generation of the battery is larger and larger.

At present, two modes of natural cooling and liquid cooling are mainly used for the heat management of the battery. The temperature in the naturally cooled battery pack is not controllable, and especially in hot summer and cold winter, the battery cannot be ensured to externally output the electric energy required by the whole vehicle. At present, a liquid cooling mode is mainly to prepare a cooling medium with a lower temperature through a vehicle-mounted air conditioning system, and cool a battery through the cooling medium, but the cooling process is usually set to be started when the temperature is higher than a threshold value and is closed when the temperature is lower than the threshold value, so that the battery is cooled in the same unit time under any condition, and along with the change of the environment, the condensation phenomenon is possibly caused inside the battery, and the performance and the service life of the battery are seriously influenced.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art, the utility model provides a direct current fills liquid cooling battery system soon.

The utility model provides a direct current fill liquid cooling battery system soon include the battery and with the liquid cooling system that the battery heat leads the connection, the battery includes the battery box, sets up electric core module in the battery box, set up be in on the diapire of battery box and with at least one liquid cooling board that the position of electric core module corresponds, respectively with each the coolant liquid pipeline of liquid cooling board intercommunication, cladding in the outer heat preservation cotton of coolant liquid pipeline and filling set up in the cavernosum between electric core module space, the absorption has insulating liquid in the cavernosum.

The utility model provides a direct current fills liquid cooling battery system soon's beneficial effect is, because carrying out radiating in-process to the battery, the temperature of the coolant liquid in the coolant liquid pipeline is great with the inside ambient temperature difference of battery, probably take place the condensation phenomenon at the outer wall of coolant liquid pipeline, through the cotton cladding of coolant liquid pipeline that keeps warm, can in time absorb the condensation that its surface probably produced on the one hand, on the other hand can guarantee that the temperature of the coolant liquid in the transmission course maintains at lower level, and then make the heat exchange of follow-up low temperature liquid cold drawing and high temperature electricity core module more abundant. Meanwhile, in the long-time use process of the battery, the temperature rise at the center of the battery core module is large, the temperature rise of the peripheral area close to the cooling liquid is small, condensation possibly occurs on the outer wall of the battery core module due to the temperature difference, the condensation can be effectively absorbed in time through the sponge body between the battery core modules, and due to the fact that insulating liquid is adsorbed in the sponge body, the sponge body is equivalent to the insulating isolation between the battery core modules and other electrified components, and the short circuit can be avoided. It is suitable for large current charged battery, and can ensure its performance and service life.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the liquid cooling system includes plate heat exchanger, heater, pump, compressor, condenser pipe and expansion valve, the liquid outlet warp of coolant liquid pipeline the pump with plate heat exchanger's first port intercommunication, plate heat exchanger's second port warp the heater with coolant liquid pipeline's inlet intercommunication, plate heat exchanger's third port warp in proper order the compressor the condenser pipe with the expansion valve communicates to plate heat exchanger's fourth port.

Adopt above-mentioned further scheme's beneficial effect is, plate heat exchanger, compressor, condenser pipe and expansion valve constitute the air conditioner return circuit, produce low coolant liquid, and simultaneously, plate heat exchanger, heater, pump and battery constitute the battery return circuit, constantly pump into and retrieve and be used for giving the radiating coolant liquid of battery, if the coolant liquid temperature is too low, accessible PTC heating device for example will get into the coolant liquid moderate heating of coolant liquid pipeline to guarantee that the performance of battery is not influenced.

Further, the cooling liquid pipeline comprises a trunk pipeline and a branch pipeline led out from the trunk pipeline, the trunk pipeline is arranged along the side wall of the battery box body, and the branch pipeline is used for communicating the trunk pipeline with the liquid cooling plate.

The beneficial effect who adopts above-mentioned further scheme is that, because electric core module can set up the multiunit, correspondingly the liquid cooling board also sets up to the multiunit, and the position of different liquid cooling boards is different, and the branch pipeline access trunk pipeline of accessible coolant liquid pipeline is with the transmission coolant liquid, simultaneously, as the inside trunk pipeline that has the most coolant liquid, sets up along the lateral wall of battery box, can guarantee pipeline structure's stability on the one hand, and on the other hand also can make the coolant liquid comparatively even to battery internal action.

Further, the battery further comprises a humidity sensor arranged beside the battery cell module.

The beneficial effect who adopts above-mentioned further scheme is that, because ambient humidity will influence the condensation critical point, detect battery internal environment humidity through humidity transducer, it can access current battery thermal management system, according to the battery internal environment humidity that detects, can adjust coolant liquid temperature in advance to avoid reaching the condensation critical point, effectively prevent the emergence of condensation phenomenon.

Furthermore, the battery also comprises a temperature sensor arranged at the liquid inlet and/or the liquid outlet of the cooling liquid pipeline.

Adopt above-mentioned further scheme's beneficial effect be, through the temperature sensor detectable go into, go out the temperature of the coolant liquid of battery, cooperation heating device can carry out moderate degree to the temperature of coolant liquid and adjust.

Further, the battery is still including set up in electric core module with heat conduction pad between the liquid cooling board, the electric core module with the liquid cooling board respectively with the heat conduction pad butt.

Adopt above-mentioned further scheme's beneficial effect be, the heat conduction pad can fully contact with electric core module and liquid cooling board respectively, improves the heat transfer efficiency between the two, effectively carries out the heat exchange.

Further, the insulating liquid is mineral oil.

The beneficial effect who adopts above-mentioned further scheme is that, mineral oil not only has insulating effect, avoids the short circuit to take place, still has certain heat absorption ability, can further improve the radiating effect to the battery.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, some brief descriptions will be given below to the drawings required to be used in the description of the embodiments or the prior art, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

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

fig. 2 is a schematic structural diagram of a dc fast charging liquid-cooled battery system according to an embodiment of the present invention.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and fig. 2, the utility model discloses direct current fills liquid cooling battery system soon includes battery 1 and the liquid cooling system that connects with battery 1 heat conduction, battery 1 include battery box 11, set up electric core module in battery box 11, set up on battery box 11's diapire and with at least one liquid cold plate 12 that the position of electric core module corresponds, respectively with the coolant liquid pipeline 13 of each liquid cold plate 12 intercommunication, cladding in the outer heat preservation cotton of coolant liquid pipeline 13 and fill set up in sponge 14 between electric core module space, the absorption has insulating liquid in the sponge 14.

Specifically, the battery cell module can be divided into one or more regions according to actual demands, a corresponding liquid cooling plate 12 is arranged below the battery cell module in each region, and the liquid cooling plate 12 can be set to be, for example, three according to actual conditions.

In this embodiment, because at the in-process that dispels the heat to the battery, the temperature of the coolant liquid in the coolant liquid pipeline 13 is great with the inside ambient temperature difference of battery, probably take place the condensation phenomenon at the outer wall of coolant liquid pipeline 13, through keeping warm cotton with coolant liquid pipeline 13 cladding, on the one hand can in time absorb the condensation that its surface probably produced, on the other hand can guarantee that the temperature of the coolant liquid in the transmission course maintains at lower level, and then make the heat exchange of follow-up low temperature liquid cold drawing 12 and high temperature electricity core module more abundant. Meanwhile, in the long-time use process of the battery, the temperature rise at the center of the battery core module is large, the temperature rise of the peripheral area close to the cooling liquid is small, condensation possibly occurs on the outer wall of the battery core module due to the temperature difference, the condensation can be effectively absorbed in time through the sponge body 14 among the battery core modules, and due to the fact that insulating liquid is adsorbed in the sponge body 14, the sponge body is equivalent to the insulating isolation arranged among the battery core modules and other electrified components, and the short circuit can be avoided. It is suitable for large current charged battery, and can ensure its performance and service life.

Preferably, the liquid cooling system includes a plate heat exchanger 21, a heater 22, a pump 23, a compressor 24, a condenser pipe 25 and an expansion valve 26, a liquid outlet of the cooling liquid pipeline 13 is communicated with a first port of the plate heat exchanger 21 through the pump 23, a second port of the plate heat exchanger 21 is communicated with a liquid inlet of the cooling liquid pipeline 13 through the heater 22, and a third port of the plate heat exchanger 21 is communicated to a fourth port of the plate heat exchanger 21 through the compressor 24, the condenser pipe 25 and the expansion valve 26 in sequence.

Specifically, the plate heat exchanger 21, the compressor 24, the condenser 25 and the expansion valve 26 form an air conditioning loop to generate low-temperature cooling liquid, and meanwhile, the plate heat exchanger 21, the heater 22, the pump 23 and the battery 1 form a battery loop to continuously pump and recycle cooling liquid for dissipating heat of the battery 1, and if the temperature of the cooling liquid is too low, the cooling liquid entering the cooling liquid pipeline 13 can be appropriately heated by, for example, a PTC heating device, so as to ensure that the service performance of the battery is not affected.

Preferably, the coolant pipe 13 includes a trunk pipe provided along a side wall of the battery case 11 and a branch pipe led out from the trunk pipe for communicating the trunk pipe with the liquid-cooled plates 12.

Specifically, because electric core module can set up the multiunit, correspondingly liquid cold plate 12 also sets up to the multiunit, and different liquid cold plate 12's position is different, and accessible coolant liquid pipeline 13's branch pipeline inserts trunk pipeline in order to transmit the coolant liquid, simultaneously, has the trunk pipeline of the most coolant liquid as inside, sets up along the lateral wall of battery box 11, can guarantee pipeline structure's stability on the one hand, and on the other hand also can make the coolant liquid comparatively even to battery internal action.

Preferably, the battery 1 further comprises a humidity sensor arranged beside the battery cell module.

Specifically, because ambient humidity will influence the condensation critical point, detect battery internal environment humidity through humidity transducer, it can insert current battery thermal management system, according to the battery internal environment humidity that detects, can adjust coolant temperature in advance to avoid reaching the condensation critical point, effectively prevent the emergence of condensation phenomenon.

Preferably, the battery 1 further comprises a temperature sensor arranged at the inlet and/or outlet of the cooling liquid duct 13.

Specifically, the temperature of the coolant entering and exiting the battery can be detected by the temperature sensor, and the temperature of the coolant can be appropriately adjusted by matching with the heating device.

Preferably, the battery 1 further comprises a heat conducting pad arranged between the battery cell module and the liquid cooling plate 12, and the battery cell module and the liquid cooling plate 12 are respectively abutted to the heat conducting pad.

Specifically, the heat conducting pad can be fully contacted with the battery cell module and the liquid cooling plate 12 respectively, so that the heat transfer efficiency between the battery cell module and the liquid cooling plate is improved, and heat exchange is effectively carried out.

Preferably, the insulating liquid is mineral oil.

Specifically, the mineral oil not only has an insulating effect and avoids short circuit, but also has certain heat absorption capacity, and the heat dissipation effect on the battery can be further improved.

The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," etc., means 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a direct current liquid cooling battery system that charges soon, its characterized in that, including battery (1) and with the liquid cooling system that battery (1) thermal conductance connects, battery (1) include battery box (11), set up electric core module in battery box (11), set up on the diapire of battery box (11) and with at least one liquid cold plate (12) that the position of electric core module corresponds, respectively with each coolant liquid pipeline (13) of liquid cold plate (12) intercommunication, cladding in the outer heat preservation cotton of coolant liquid pipeline (13) and filling set up in cavernosum (14) between electric core module space, the absorption has insulating liquid in cavernosum (14).

2. The direct-current quick-charging liquid-cooling battery system as claimed in claim 1, wherein the liquid-cooling system comprises a plate heat exchanger (21), a heater (22), a pump (23), a compressor (24), a condenser pipe (25) and an expansion valve (26), a liquid outlet of the cooling liquid pipeline (13) is communicated with a first port of the plate heat exchanger (21) through the pump (23), a second port of the plate heat exchanger (21) is communicated with a liquid inlet of the cooling liquid pipeline (13) through the heater (22), and a third port of the plate heat exchanger (21) is communicated with a fourth port of the plate heat exchanger (21) through the compressor (24), the condenser pipe (25) and the expansion valve (26) in sequence.

3. The direct-current quick-charging liquid-cooled battery system according to claim 1, wherein the cooling liquid pipeline (13) comprises a trunk pipeline and a branch pipeline led out from the trunk pipeline, the trunk pipeline is arranged along the side wall of the battery box body (11), and the branch pipeline is used for communicating the trunk pipeline with the liquid-cooled plate (12).

4. The direct-current fast-charging liquid-cooled battery system according to any one of claims 1 to 3, wherein the battery (1) further comprises a humidity sensor disposed beside the cell module.

5. The direct current quick charge liquid cooled battery system according to claim 4, wherein the battery (1) further comprises a temperature sensor disposed at the inlet and/or outlet of the cooling liquid conduit (13).

6. The direct-current quick-charging liquid-cooled battery system according to claim 1, wherein the battery (1) further comprises a heat conducting pad disposed between the cell module and the liquid-cooled plate (12), and the cell module and the liquid-cooled plate (12) are respectively abutted against the heat conducting pad.

7. The direct current fast charging liquid cooled battery system of claim 1, wherein the insulating liquid is mineral oil.