CN211480106U

CN211480106U - Integrated battery pack of liquid cooling system

Info

Publication number: CN211480106U
Application number: CN201921790165.8U
Authority: CN
Inventors: 王庆超; 冯彬彬
Original assignee: Suzhou Zhengli New Energy Technology Co ltd
Current assignee: Suzhou Zhengli New Energy Technology Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-09-11
Anticipated expiration: 2029-10-24

Abstract

The utility model discloses a liquid cooling system integrated form battery package. In the battery pack, the liquid cooling system is integrated and arranged in the battery pack box body, the battery pack box body is divided into two bins through one layer of temperature equalizing plate, and the liquid cooling system and the battery module are respectively arranged in the two bins. The battery pack box body comprises an upper cover, a box body internal cross beam, a lower box body plate and a box body boundary beam; the crossbeam, the temperature equalizing plate and the box body boundary beam inside the box body are connected into a whole, the battery module is fixedly connected with the box body boundary beam, and the liquid cooling system is arranged at the bottom of the box body. The liquid cooling system comprises a water inlet, a front end water inlet pipe, a water inlet end liquid collecting pipe, a harmonica pipe, an outlet end liquid collecting pipe, a front end water outlet pipe and a water outlet which are integrally arranged, the cooperation between the outlet end liquid collecting pipe and the harmonica pipe is limited through a limiting boss and is connected together through brazing, and the cavities of the outlet end liquid collecting pipe and the harmonica pipe are communicated through an outlet of the outlet liquid collecting pipe. The utility model has the advantages of simple and compact structure, safe and reliable, be convenient for improve production efficiency.

Description

Integrated battery pack of liquid cooling system

Technical Field

The invention relates to the technical field of battery thermal management of new energy automobiles, in particular to an integrated battery pack of a liquid cooling system.

Background

With the rapid development of new energy automobiles, people pursue higher and higher power of the whole automobile, and the energy density of a battery system is gradually meeting the requirements of people. However, the heat generated by the battery during the use directly affects the endurance mileage, the service life and the safety of the battery pack.

At present, three heat dissipation modes of natural cooling, forced air cooling and liquid cooling mainly exist in the new energy market. However, natural cooling has not been effective in dissipating heat from the battery system; forced air cooling can cause too large temperature difference of a battery system, and can not meet the cooling requirement of the battery pack under large discharge rate, and meanwhile, the air cooling system can not ensure the sealing requirement of the battery pack system, so that the battery is easily exposed to the ambient temperature; the liquid cooling system can carry out effectual cooling to battery system at present, guarantees the temperature homogeneity of battery, and the cooling plate of most of liquid cooling system all arranges in the bottom of battery module nevertheless, and the installation is too loaded down with trivial details, influences production efficiency, in case the coolant liquid leaks, can cause harm to battery system.

Disclosure of Invention

The invention aims to provide a liquid cooling system integrated battery pack which is simple and compact in structure, safe and reliable.

The technical solution for realizing the purpose of the invention is as follows: the utility model provides a liquid cooling system integrated form battery package, the liquid cooling system integration sets up in the battery package box, divide into two storehouses with the battery package box through one deck samming board, and the inside in these two storehouses sets up liquid cooling system and battery module respectively.

Furthermore, the battery pack box body comprises an upper cover, a box body internal cross beam, a lower box body plate and a box body side beam; the internal cross beam of the box body, the temperature equalizing plate and the box body boundary beam are connected into a whole, the battery module is fixedly connected with the box body boundary beam, and the liquid cooling system is arranged at the bottom of the box body.

Further, the liquid cooling system comprises a water inlet, a front end water inlet pipe, a water inlet end liquid collecting pipe, a harmonica pipe, an outlet end liquid collecting pipe, a front end water outlet pipe and a water outlet which are integrally arranged in a welding mode.

Furthermore, the outlet end liquid collecting pipe and the harmonica pipe are limited to be matched through a limiting boss and are connected together through brazing; each harmonica tube is internally provided with an internal reinforcing rib of the harmonica tube; the cavity of the outlet end liquid collecting pipe and the cavity of the harmonica tube are communicated through the outlet of the outlet liquid collecting pipe.

Furthermore, the pipe wall of the water inlet end liquid collecting pipe is provided with a flow distributing opening in the water inlet end liquid collecting pipe with different diameters, and the cooling liquid is subjected to throttling treatment by adjusting the size and the position of the flow distributing opening.

Furthermore, the front end water inlet pipe, the water inlet end liquid collecting pipe and the front end water inlet pipe are welded into a whole through brazing. .

Further, a layer of heat-conducting glue is coated between the temperature equalizing plate and the harmonica tube.

Furthermore, the lower box body plate is welded with the box body boundary beam to embed the liquid cooling system at the bottom of the box body, and the upper cover and the box body boundary beam are connected into a whole in a bolt or bonding mode.

Furthermore, the position avoiding area of the collecting pipe is reserved at the front end section bar of the box body of the bottom area and the inner cross beam section bar of the box body of the battery pack box body and is used for matching the front end water inlet pipe, the water inlet end liquid collecting pipe, the outlet end liquid collecting pipe, the front end water outlet pipe and the box body.

Furthermore, in the branch ports in the liquid collecting pipe at the water inlet end, the cross sectional area from the branch port at the front end to the branch port at the rear end is increased progressively.

Compared with the prior art, the invention has the following remarkable advantages: (1) the liquid cooling system and the battery module are integrated, the installation is compact, the whole package installation is convenient and fast, and the production efficiency is improved; (2) the cold plate system adopts an integrated structure, so that a joint is avoided, and the risk of leakage of cooling liquid is reduced; (3) the liquid cooling system and the battery system are arranged in a separated bin manner, so that the influence of the leakage of the cooling liquid on the battery system is reduced, and the function of heat preservation on the battery system is added; (4) the liquid cooling system is connected with the temperature-equalizing plate in the box body by adopting heat-conducting structural adhesive, so that the cold plate can be better contacted with the temperature-equalizing plate, a supporting piece is avoided, and the cost is reduced; (5) the liquid cooling system directly completes the shunting of each harmonica pipe in the collecting pipe, and the heat dissipation is more uniform by setting the size and the position of the shunting port, and the production and installation processes are simplified.

Drawings

Liquid cooling system integrated battery pack liquid cooling system battery module

Fig. 1 is a structural view of an integrated liquid cooling system battery pack according to the present invention.

Fig. 2 is a structural view of a liquid cooling system.

Fig. 3 is a partial sectional structural view of a liquid cooling system, wherein (a) is a top view, (b) is a sectional view taken along line a-a in (a), and (c) is a partial enlarged view in (b).

FIG. 4 is a schematic diagram of an internal flow passage of a liquid cooling system, wherein (a) is a top view, (B) is a cross-sectional view taken along line A-A in (a), (C) is an enlarged view of a portion B in (B), and (d) is an enlarged view of a portion C in (B).

Fig. 5 is a partial view of the liquid cooling system, wherein (a) is a perspective view of the liquid cooling system integrated battery pack, (b) is an enlarged view of a portion E of (a), and (c) is an enlarged view of a portion F of (a).

Fig. 6 is a partial combination view of the liquid cooling system and the case, wherein (a) is a top view of the liquid cooling system integrated battery pack, (b) is a cross-sectional view taken along line a-a in (a), and (c) is an enlarged view of a portion G in (b).

Reference numbers in the figures: 101 water inlet, 102 front end inlet tube, 103 intake end collector tube, 104 harmonica pipe, 105 exit end collector tube, 106 front end outlet pipe, 107 delivery ports, 201 upper cover, 202 battery module, 203 box inside crossbeam, 204 liquid cooling system, 205 lower box body board, 206 box boundary beam, 207 temperature equalizing plate, 302 export collector tube flow export, 303 spacing boss, 305 harmonica inside strengthening rib, 401 intake end collector tube internal diffluence pass, 403 front end inlet tube welding cooperation end, 501 box front end section bar, 502 box inside crossbeam section bar.

Detailed Description

According to the integrated battery pack with the liquid cooling system, the liquid cooling system is integrated and arranged in the battery pack box body, the battery pack box body is divided into two bins through the uniform temperature plate 207, and the liquid cooling system 204 and the battery module 202 are respectively arranged in the two bins.

Further, the battery pack box comprises an upper cover 201, a box inner cross beam 203, a lower box body plate 205 and a box body side beam 206; the internal cross beam 203 of the box body, the temperature equalizing plate 207 and the box body side beam 206 are connected into a whole, the battery module 202 is fixedly connected with the box body side beam 206, and the liquid cooling system 204 is arranged at the bottom of the box body.

Further, the liquid cooling system 204 includes a water inlet 101, a front end water inlet pipe 102, a water inlet end liquid collecting pipe 103, a harmonica pipe 104, an outlet end liquid collecting pipe 105, a front end water outlet pipe 106, and a water outlet 107 which are integrally arranged in a welding manner.

Furthermore, the outlet end liquid collecting pipe 105 and the harmonica pipe 104 are limited to be matched through a limiting boss 303 and are connected together through brazing; a harmonica tube internal reinforcing rib 305 is arranged in each harmonica tube 104; the outlet end header 105 and the cavity of the harmonica tube 104 are in communication through an outlet header outflow port 302.

Further, the pipe wall of the water inlet end liquid collecting pipe 103 is provided with a water inlet end liquid collecting pipe internal branch opening 401 with different diameters, and the cooling liquid is subjected to throttling treatment by adjusting the size and the position of the branch opening.

Further, the front end water inlet pipe 102, the water inlet end liquid collecting pipe 103 and the front end water inlet pipe welding matching end 403 are welded into a whole through brazing.

Further, a layer of heat conducting glue is coated between the temperature equalizing plate 207 and the harmonica tube 104.

Further, the lower box body plate 205 is welded with the box body edge beam 206 to embed the liquid cooling system 204 in the bottom of the box body, and the upper cover 201 and the box body edge beam 206 are connected into a whole through bolts or bonding.

Furthermore, the avoiding area of the collecting pipe is reserved at the front end profile 501 of the battery pack box body and the inner cross beam profile 502 of the box body in the bottom area, and is used for matching the front end water inlet pipe 102, the water inlet end liquid collecting pipe 103, the outlet end liquid collecting pipe 105, the front end water outlet pipe 106 and the box body.

Further, in the water inlet end liquid collecting pipe internal branch opening 401, the cross-sectional area from the front end branch opening to the back end branch opening is gradually increased.

The invention is described in further detail below with reference to the figures and the embodiments.

Examples

Referring to fig. 1 to 6, the liquid cooling system integrated battery pack of the present invention is integrated in a battery pack case, the battery pack case is divided into two compartments by a uniform temperature plate 207, and the liquid cooling system 204 and the battery module 202 are respectively disposed in the two compartments.

Referring to fig. 1, the battery pack case includes an upper cover 201, a case inner cross beam 203, a lower case plate 205, and a case side beam 206; the internal cross beam 203 of the box body, the temperature equalizing plate 207 and the box body side beam 206 are connected into a whole, the battery module 202 is fixedly connected with the box body side beam 206, and the liquid cooling system 204 is arranged at the bottom of the box body.

Referring to fig. 2, the liquid cooling system 204 includes a water inlet 101, a front water inlet pipe 102, a water inlet end liquid collecting pipe 103, a harmonica pipe 104, an outlet end liquid collecting pipe 105, a front water outlet pipe 106, and a water outlet 107, which are integrally welded. The whole process does not use a water pipe joint, the risk of liquid leakage caused by the existence of the joint is reduced, and meanwhile, the integration of the liquid cooling system can effectively improve the production efficiency.

With reference to fig. 3(a) - (c), the outlet end header 105 and the harmonica tube 104 are limited in matching by a limit boss 303 and are connected together by brazing; a harmonica tube internal reinforcing rib 305 is arranged in each harmonica tube 104; the outlet end header 105 and the cavity of the harmonica tube 104 are in communication through an outlet header outflow port 302. Each harmonica tube is internally provided with a reinforcing rib 305, so that the harmonica tube 104 can have certain strength, and heat exchange can be enhanced.

Referring to fig. 4(a) - (d), the tube wall of the water inlet end liquid collecting tube 103 is provided with a water inlet end liquid collecting tube internal branch opening 401 with different diameters, and the size and position of the branch opening are adjusted to perform throttling treatment on the cooling liquid. In the water inlet end liquid collecting pipe internal branch port 401, the cross-sectional area from the front end branch port to the back end branch port increases progressively. The collecting pipe of the liquid cooling system is designed in a throttling mode, different flow distribution ports are arranged in the collecting pipe at the water inlet end, the size and the position of each flow distribution port are adjusted to carry out throttling treatment on the cooling liquid, and therefore the purpose that the cooling liquid entering each harmonica pipe is uniform is achieved.

Further, the front end water inlet pipe 102 and the water inlet end liquid collecting pipe 103 are brazed into a whole through the front end water inlet pipe welding matching end 403.

With reference to fig. 5(a) - (c), the avoiding area of the collecting pipe is reserved in the bottom area of the tank body for matching the collecting pipe with the tank body. Specifically, the avoiding area of the collecting pipe is reserved at the front end profile 501 of the battery pack box body and the inner cross beam profile 502 of the box body in the bottom area, and is used for matching the front end water inlet pipe 102, the water inlet end liquid collecting pipe 103, the outlet end liquid collecting pipe 105, the front end water outlet pipe 106 and the box body.

Referring to fig. 6(a) - (c), a layer of heat-conducting glue is coated between the temperature equalization plate 207 and the harmonica tube 104. Because the flatness of harmonica pipe and temperature equalization board can not be 0 at actual process, unevenness can exist in the place of both interfaces to influence thermal transmission, in order to solve this problem, need coat one deck heat-conducting glue (heat-conducting glue material is not limited to silica gel) before harmonica pipe and the temperature equalization board, not only can make the temperature equalization of whole cold drawing better, can effectual bonding cold drawing and temperature equalization moreover.

The lower box body plate 205 is welded with the box body edge beam 206 to embed the liquid cooling system 204 at the bottom of the box body, and the upper cover 201 and the box body edge beam 206 are connected into a whole in a bolt or bonding mode.

The assembly process of the box body comprises the following steps: the box inner cross beam 203, the box inner temperature-equalizing plate 207 and the box boundary beam 206 are connected together in a welding or bonding mode, the battery module 202 is fixed with the box inner cross beam 203 in a bolt connection mode and the like, the liquid cooling system 204 is arranged at the bottom of the box and is connected with the box in a heat-conducting glue or other limiting modes, the lower box body plate 205 is embedded into the bottom of the box by being welded with the box boundary beam 206, and finally the upper cover 201 and the box boundary beam 206 are connected together in a bolt or bonding mode.

The liquid cooling system integrated battery pack is integrated by the liquid cooling system and the box body, only the installation of components except the liquid cooling system is considered in the battery system assembling process, and the whole pack is convenient and compact in the installation process. The liquid cooling system and the battery module are independently separated, the whole battery pack is divided into two bins through the uniform temperature plate, the influence of leakage of cooling liquid on the battery system can be reduced, meanwhile, air in the liquid cooling system bin at the bottom of the battery module can effectively isolate external heat transfer, and the function of heat preservation of the battery system is increased.

Claims

1. A liquid cooling system integrated battery pack is characterized in that a liquid cooling system is integrated in a battery pack box body, the battery pack box body is divided into two bins through a layer of temperature equalizing plate (207), and the liquid cooling system (204) and a battery module (202) are respectively arranged in the two bins;

the battery pack box body comprises an upper cover (201), a box body internal cross beam (203), a lower box body plate (205) and a box body side beam (206); the internal cross beam (203) of the box body, the temperature equalizing plate (207) and the box body boundary beam (206) are connected into a whole, the battery module (202) is fixedly connected with the box body boundary beam (206), and the liquid cooling system (204) is arranged at the bottom of the box body.

2. The integrated liquid cooling system battery pack according to claim 1, wherein the liquid cooling system (204) comprises a water inlet (101), a front water inlet pipe (102), a water inlet end liquid collecting pipe (103), a harmonica pipe (104), an outlet end liquid collecting pipe (105), a front water outlet pipe (106) and a water outlet (107) which are integrally arranged in a welding manner.

3. The integrated liquid cooling system battery pack according to claim 2, wherein the outlet header tube (105) and the harmonica tube (104) are connected by soldering, while being restricted by a limit boss (303); an internal reinforcing rib (305) of the harmonica tube is arranged in each harmonica tube (104); the cavity of the outlet end collecting pipe (105) is communicated with the cavity of the harmonica pipe (104) through an outlet (302) of the outlet end collecting pipe.

4. The integrated liquid cooling system battery pack according to claim 2, wherein the wall of the inlet manifold (103) is provided with a plurality of flow-dividing ports (401) with different diameters, and the flow-dividing ports are adjusted to throttle the cooling liquid.

5. The integrated liquid cooling system battery pack according to claim 2, wherein the front water inlet pipe (102), the water inlet end liquid collecting pipe (103) and the front water inlet pipe welding and matching end (403) are welded together by brazing.

6. The integrated liquid-cooled system battery pack according to claim 3, 4 or 5, wherein a layer of thermally conductive adhesive is applied between the vapor chamber (207) and the harmonica tube (104).

7. The integrated liquid cooling system battery pack according to claim 3, 4 or 5, wherein the lower case plate (205) is welded to the case edge beam (206) to embed the liquid cooling system (204) in the bottom of the case, and the upper cover (201) and the case edge beam (206) are connected together by bolts or by bonding.

8. A liquid cooling system integrated battery pack as claimed in claim 3, 4 or 5, wherein the battery pack box body is provided with a position avoiding area of a collecting pipe at a box body front end profile (501) and a box body inner beam profile (502) in the bottom area for matching the front end water inlet pipe (102), the water inlet end liquid collecting pipe (103), the outlet end liquid collecting pipe (105), the front end water outlet pipe (106) and the box body.

9. The integrated liquid-cooled battery pack according to claim 4, wherein the cross-sectional area of the front side branch port is gradually increased from the cross-sectional area of the rear side branch port in the branch port (401) in the inlet side liquid collecting pipe.