CN219959173U - Battery box and battery pack - Google Patents

Abstract

The utility model relates to the field of new energy power batteries, and discloses a battery box and a battery pack, wherein the battery box comprises a bottom plate and a frame, the bottom plate is provided with a first flow channel, a first water inlet and a first water outlet which are communicated with the first flow channel, the frame is provided with a second flow channel, a second water inlet and a second water outlet which are communicated with the second flow channel, the first water inlet and the first water outlet are arranged on the surface of the bottom plate, which is attached to the frame, the second water inlet and the second water outlet are arranged on the surface of the frame, which is attached to the bottom plate, the first water inlet is in sealing connection with the second water outlet, and the second water inlet is in sealing connection with the first water outlet so as to communicate the first flow channel with the second flow channel. The beneficial effects of the utility model are as follows: the battery box solves the problems of installation, weight, cost and the like of the battery box, achieves the purposes of improving the strength and the mode of the box and stabilizing the structure of the box, plays a role in reducing the weight, and saves the cost of parts and installation of an external water pipe and a connector on the premise of not influencing the liquid cooling function of the battery box.

Description

Battery box and battery pack

Technical Field

The utility model relates to the field of new energy power batteries, in particular to a battery box and a battery pack.

Background

The traditional liquid cooling system of the power battery pack mainly comprises a liquid cooling system arranged at the bottom of the battery, and the liquid cooling system with the bottom and the side connected in parallel is developed in recent years along with the improvement of the charge and discharge multiplying power of the battery to solve the problem of heat management caused by the rapid charge of the battery system.

The liquid cooling plate used for cooling the bottom of the conventional battery pack mainly comprises the following two forms: a built-in installation type liquid cooling plate and an integrated liquid cooling plate are arranged. The side liquid cooling is mainly performed by a deformed aluminum alloy liquid cooling plate (extruded aluminum alloy profile). The built-in installation type bottom liquid cooling plate is characterized in that the liquid cooling plate is separated from the box body, and in order to avoid the distribution of the transverse longitudinal beams in the box body, the bottom liquid cooling plate is required to be divided into a plurality of pieces and then connected by an external pipeline. The integrated liquid cooling plate is characterized by being used as a bottom plate of a battery box, and no additional external water pipe and connector are needed to be connected.

In the bottom liquid cooling plate form, when side liquid cooling is required, a plurality of groups of water pipes and connectors are also required to connect the side liquid cooling plate and the flow channel of the bottom liquid cooling plate in series-parallel.

In view of the above, the present utility model aims to provide a new energy battery box body including an integrated liquid cooling system without a water pipe, so as to solve the problems of complex internal installation structure and high cost of the battery box body.

Disclosure of Invention

The utility model aims to solve the technical problems that: the existing battery box body fluid cooling system is complex in structure and high in cost.

In order to solve the above technical problems, the present utility model provides a battery box, including:

a bottom plate having a first flow passage, a first water inlet and a first water outlet in communication with the first flow passage; a frame connected to the base plate and defining with the base plate a receiving location for receiving a battery, the frame having a second flow passage and a second water inlet and a second water outlet in communication with the second flow passage; the first water inlet and the first water outlet are arranged on the surface of the bottom plate, which is attached to the frame, the second water inlet and the second water outlet are arranged on the surface of the frame, which is attached to the bottom plate, the first water inlet is in sealing connection with the second water outlet, and the second water inlet is in sealing connection with the first water outlet so as to be communicated with the first runner and the second runner.

A battery pack, comprising:

the battery case as described above;

and a battery disposed within the storage location.

Compared with the prior art, the battery box and the battery pack have the beneficial effects that:

according to the utility model, the first water inlet and the first water outlet on the bottom plate are connected with the second water outlet and the second water inlet on the frame in an abutting manner, so that the conventional pipeline structure is avoided, the problems of installation, weight, cost and the like of the battery box body are solved, the purposes of improving the strength and the mode of the box body and stabilizing the structure of the box body are achieved, meanwhile, the effect of weight reduction can be achieved, and the part cost and the installation cost of an external water pipe and a connector are saved on the premise that the liquid cooling function of the battery box body is not influenced.

Drawings

Fig. 1 is an assembly view of a battery case of the present utility model;

fig. 2 is an exploded view of the battery case of the present utility model;

FIG. 3 is an exploded view of the floor of the present utility model;

FIG. 4 is a schematic structural view of the frame of the present utility model;

FIG. 5 is a schematic view of the structure of the first beam of the present utility model;

fig. 6 is an enlarged view of a portion a in fig. 5;

FIG. 7 is a schematic view of the structure of the second beam of the present utility model;

fig. 8 is a front view of the battery case of the present utility model;

FIG. 9 is a cross-sectional view of section B-B of FIG. 8;

fig. 10 is an enlarged view of a portion C in fig. 9;

fig. 11 is an enlarged view of a portion D in fig. 9;

FIG. 12 is a schematic illustration of the communication of a first flow passage and a second flow passage of the present utility model;

fig. 13 is an enlarged view of the portion E in fig. 12.

In the figure, 1, a bottom plate; 11. a first flow passage; 12. a first water inlet; 13. a first water outlet; 14. a water inlet main port; 15. a water outlet port; 16. a first plate; 17. a second plate; 2. a frame; 21. a second flow passage; 211. a first sub-flow path; 212. a second sub-flow path; 213. a first sub-flow path; 22. a second water inlet; 23. a second water outlet; 24. a frame; 241. a fourth opening; 25. a beam frame; 251. a first beam; 2511. a first opening; 252. a second beam; 2521. a second opening; 2522. a third opening; 3. an accommodating space; 31. rong Zhiwei; 4. a battery; 5. a first seal; 6. a second seal;

r11 is the inner diameter of the first water inlet; r12 is the inner diameter of the first water outlet; l21, the outer diameter of the second water outlet; l22, second water inlet external diameter.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. in the present utility model are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As shown in fig. 1 to 6, the present utility model provides a battery case comprising: a base plate 1 and a frame 2, the base plate 1 having a first flow passage 11, a first water inlet 12 and a first water outlet 13 communicating with the first flow passage 11; the frame 2 is connected to the base plate 1 and defines, together with the base plate 1, a receiving space 31 for receiving the battery 4. It should be noted that the frame 2 may be disposed on the base plate 1, that is, the bottom of the frame 2 is connected to the top of the base plate 1, or the side of the frame 2 is connected to the side of the base plate 1. The frame 2 has a second flow passage 21, a second water inlet 22 and a second water outlet 23 communicating with the second flow passage 21; wherein, the first water inlet 12 and the first water outlet 13 are arranged on the surface of the bottom plate 1, which is attached to the frame 2, the second water inlet 22 and the second water outlet 23 are arranged on the surface of the frame 2, which is attached to the bottom plate 1, the first water inlet 12 is in sealing connection with the second water outlet 23, and the second water inlet 22 is in sealing connection with the first water outlet 13 so as to be communicated with the first flow channel 11 and the second flow channel 21.

Based on the technical scheme, the first water inlet 12 and the first water outlet 13 on the bottom plate 1 are in sealing connection with the second water outlet 23 and the second water inlet 22 on the frame 2, so that the conventional pipeline structure is avoided, the problems of installation, weight, cost and the like of the battery box body are solved, the purposes of improving the strength and the mode of the box body and stabilizing the structure of the box body are achieved, the weight reduction effect can be achieved, and the part cost and the installation cost of an external water pipe and a connector are saved on the premise that the cold function of the battery box body is not influenced.

The structure of the first flow passage 11 and the second flow passage 21 will be described in detail herein: the first runner 11 is arranged on the bottom plate 1, the second runner 21 is arranged on the frame 2, the first runner 11 needs to flow through all positions of the bottom plate 1, and the second runner 21 needs to flow through all positions of the frame 2 in order to achieve better cooling effect, therefore, preferably, the first runner 11 is in a serpentine arrangement, the first water inlet 12 is arranged on one side of the bottom plate 1, the first water outlet 13 is arranged close to the first water inlet 12, the second water outlet 23 is butted with the first water inlet 12, the second water inlet 22 is butted with the first water outlet 13, the second runner 21 of the frame 2 is divided into an upper layer and a lower layer, the second water inlet 22 and the second water outlet 23 are respectively communicated with the upper layer and the lower layer, cooling liquid in the first runner 11 flows into the second runner 21 through the first water outlet 13 and the second water inlet 22 except for cooling the bottom of the battery box, cooling liquid flows into the frame 2 through the first water inlet 22, thus cooling the middle gap and the side wall of the battery box, the cooling liquid flowing into the second runner 21 from the opening of the upper layer and the lower layer flows into the lower layer 2, and finally the cooling liquid flows into the first runner 11 through the second runner 23, and the second runner 11 is circulated, and finally, the cooling liquid flows into the first runner 11 is circulated.

In one embodiment, the battery box as shown in fig. 4-6 and fig. 12 and 13 further comprises a first seal 5 and a second seal 6; the first sealing element 5 is arranged at the joint of the first water inlet 12 and the second water outlet 23 so as to connect the first water inlet 12 and the second water outlet 23 in a sealing way; the second sealing member 6 is disposed at the connection position between the second water inlet 22 and the first water outlet 13, so as to seal and connect the second water inlet 22 and the first water outlet 13. The bottom plate 1 is connected with the frame 2 in a sealing way, so that the connection reliability of the water inlet and the water outlet is ensured while the connection pipe is omitted, and therefore, the connection position of the water inlet and the water outlet is required to be subjected to sealing treatment, water leakage at the connection position of the water inlet and the water outlet is avoided, and the use safety of the battery box is improved.

In some embodiments of the present utility model, as shown in fig. 4-6 and fig. 12 and 13, a second water outlet is inserted into the first water inlet, and the second water inlet is inserted into the first water outlet; the second water outlet is inserted into the first water inlet, and the second water inlet is inserted into the first water outlet, so that the tightness of the connection between the frame and the bottom plate can be ensured, and water leakage is prevented.

Specifically, with continued reference to fig. 4-6 and fig. 12 and 13, the inner diameter of the first water inlet is R11, the inner diameter of the first water outlet is R12, the outer diameter of the second water outlet is L21, and the outer diameter of the second water inlet is L22; wherein, L21/R11 is more than or equal to 0.9 and less than or equal to 0.998,0.9, L22/R12 is more than or equal to 0.998. The ratio of the outer diameter of the second water outlet to the inner diameter of the first water inlet and the ratio of the outer diameter of the second water inlet to the inner diameter of the first water outlet are both between 0.9 and 0.998, so that tight connection can be ensured, leakage is avoided, the insertion is not too difficult, and the connection structure is convenient to install and good in reliability.

In another embodiment of the present utility model, a first water inlet is inserted into the second water outlet, and a first water outlet is inserted into the second water inlet; the outer diameter of the first water inlet is L11, the outer diameter of the first water outlet is L12, the inner diameter of the second water outlet is R21, and the inner diameter of the second water inlet is R22; wherein, L11/R21 is more than or equal to 0.9 and less than or equal to 0.998,0.9, L12/R22 is more than or equal to 0.998; the difference between the embodiment of inserting the second water inlet and the first water outlet and the embodiment of inserting the second water outlet and the first water inlet is that the setting position of the convex structure is changed from the second water inlet and the second water outlet to the first water inlet and the first water outlet, the effect is identical to that of the previous embodiment, and the description of the drawings is omitted herein and the description is omitted.

In some embodiments of the utility model, as shown in fig. 2 and 4, the frame 2 includes: the frame 24 and the roof beam structure 25, the frame 24 surrounds and defines accommodation space 3, and roof beam structure 25 locates in accommodation space 3 and separates accommodation space 3 and form accommodation position 31, and the battery sets up in accommodation position 31. The second runner 21 includes a first runner 213 and a second runner, the first runner 213 is disposed inside the frame 2, and the second runner is disposed inside the beam 25. Specifically, the first subchannel 213 may be in communication with the second subchannel to constitute the second runner, or the first subchannel 213 may not be in communication with the second subchannel, for example, the first subchannel 213 is connected in parallel with the second subchannel, both of which are constituent parts of the second runner.

In addition, the second water inlet 22 and the second water outlet 23 may be both disposed on the surface of the beam 25 that is in contact with the bottom plate 1, or both disposed on the surface of the frame 24 that is in contact with the bottom plate 1, or when the second flow diversion channel in the beam 25 is in communication with the first flow diversion channel 213 in the frame 24, the second water inlet 22 and the second water outlet 23 may be disposed on the frame 24 and the beam 25, respectively.

Various embodiments of the frame 24 and beam 25 are described in detail herein: the frame 24 and the beam 25 may or may not be connected. When the frame 24 is connected with the beam frame 25, the hollow structures inside the frame 24 and the beam frame 25 are communicated, so that a second flow channel 21 is formed, at the moment, the second water inlet 22 and the second water outlet 23 can be simultaneously arranged on the frame 24, can be simultaneously arranged on the beam frame 25, can be also arranged on the frame 24, and can be arranged on the beam frame 25, so long as the first flow channel 11 and the second flow channel 21 are communicated and can walk water. When the frame 24 is not connected with the beam frame 25, the two hollow internal structures can be collectively called as the second flow channel 21 by taking the functionality as the leading effect, and the beam frame 25 is positioned between the batteries due to heat generated during the operation of the batteries, so that a water inlet with lower temperature is required to be arranged on the beam frame 25, and the water inlet and the water outlet cannot be separately arranged or are only arranged on the frame so as to balance the heat dissipation effect of each part, ensure that the whole heat of the batteries has consistency, and achieve better cooling effect. Further, for the structure when the frame 24 and the beam 25 are connected, the water inlet is provided on the beam 25 for the purpose of balancing heat dissipation.

Specifically, as shown in fig. 2 and fig. 4 to 8, the beam 25 includes: the first beam 251 and the second beam 252 are disposed to cross each other, and preferably, the first beam 251 and the second beam 252 are disposed to be perpendicular to each other. In one embodiment, the first beam 251 is a cross beam and the second beam 252 is a side beam. The second shunt includes: the first sub-runner 211 and the second sub-runner 212 are arranged in the first beam 251, and/or the second sub-runner 212 is arranged in the second beam. That is, the cooling flow channels may be provided in both the first beam 251 and the second beam 252, so that the multi-surface liquid cooling is provided for the battery, the battery can be sufficiently cooled, the cooling effect is improved, and the cooling flow channels may be provided only in the first beam 251 or the second beam 252, so that the entire weight of the battery pack can not be increased more under the condition of ensuring heat dissipation. In a specific embodiment, the second water inlet 22 and the second water outlet 23 may be disposed on the first beam 251 or the second beam 252, or the second water inlet 22 and the second water outlet 23 may be disposed on the first beam 251 and the second beam 252, respectively, in the case that the first sub-runner 211 and the second sub-runner 212 are communicated, or the second water inlet 22 and the second water outlet 23 may be disposed on one of the first beam 251, the second beam 252, and the frame 24, respectively, in the case that the beam frame 25 is communicated with the frame 24.

More specifically, as shown in fig. 2, 4 and 9, the number of the first beams 251 is three, the number of the second beams 252 is two, the first beams 251 are arranged between the two second beams 252 at intervals, two ends of the first beams 251 are respectively connected with the two second beams 252, and two ends of the second beams 252 are connected with the frame 24. As a preferred embodiment, the battery box body manufactured by the three first beams 251 and the two second beams 252 has reasonable structure and proper size, and can better provide power for the power system.

More specifically, as shown in fig. 9 to 11, the first beam 251 is provided with a first opening 2511 at two ends, the second beam 252 is provided with a second opening 2521 at a corresponding position, and the first opening 2511 is in sealing connection with the second opening 2521 so as to communicate the first sub-runner 211 with the second sub-runner 212; third openings 2522 are formed at two ends of the second beam 252, fourth openings 241 are formed at corresponding positions of the frame 24, and the third openings 2522 are connected with the fourth openings 241 in a sealing manner so as to communicate the second sub-runners 212 with the first sub-runners 213. The first opening 2511 is in sealing connection with the second opening 2521, so that the first beam 251 is communicated with the flow dividing channel of the second beam 252, the circulation of liquid is realized, the third opening 2522 is in sealing connection with the fourth opening 241, the second beam 252 is communicated with the flow dividing channel of the frame 24, the circulation of liquid is also realized, and the liquid circulation cooling is realized by combining the water inlet and the water outlet.

In some embodiments of the present utility model, as shown in fig. 2, 3 and 8, the base plate 1 is provided with a water inlet port 14 and a water outlet port 15, wherein the water inlet port 14 is used for introducing the cooling liquid into the first flow channel 11 from the outside, and the water outlet port 15 is used for leading the cooling liquid out of the first flow channel 11 to the outside. The first runner 11 communicates the external liquid runner with the internal second runner 21, so that the battery box body is communicated with external liquid, liquid cooling circulation is realized, and the purpose of improving the liquid cooling effect is achieved. The cooling liquid entering from the water inlet main port 14 flows in the first flow channel 11, continuously provides low-temperature cooling liquid for the first flow channel 11, wherein the first flow channel 11 extends in a serpentine shape on the bottom plate 1 and flows into most areas of the bottom plate 1 so as to ensure the cooling effect of the bottom plate 1, part of the cooling liquid flows through the first flow channel 11 and directly flows out of the water outlet main port 15, the other part of the cooling liquid flows into the second flow channel 21 through the first water outlet 13 and the second water inlet 22, flows back to the second water outlet 23 and the first water inlet 12 after flowing through most positions of the frame 2, returns to the first flow channel 11, and finally flows out of the battery box body from the water outlet main port 15. By adopting the cooling step, the cooled high-temperature cooling liquid can be continuously discharged out of the battery box body, and low-temperature cooling liquid is continuously supplemented into the battery box body, so that the cooling effect of the battery box body is always in a good state.

Specifically, as shown in fig. 3, the base plate 1 includes: the first plate 16 and the second plate 17, the frame 2 is attached to the first plate 16, the first plate 16 is covered on the second plate 17, a first flow channel 11 is defined between the first plate 16 and the second plate 17, and the first water inlet 12, the first water outlet 13, the water inlet main port 14 and the water outlet main port 15 are all arranged on the first plate 16. The bottom plate 1 adopts a double-layer structure design, and the first plate 16 and the second plate 17 are welded into a whole to form a first flow channel 11, so that the purpose of water running is achieved; in addition, the bottom plate 1 can also adopt a section bar bottom plate 1, and the internal cavity is in a liquid cooling mode so as to achieve the same purpose.

As shown in fig. 2, a battery pack includes: as with the battery case and the battery 4 described above, the battery 4 is disposed in the storage location 31.

The waterway trend of the utility model is described herein: the external water flow firstly enters the first flow channel 11 from the water inlet main port 14, and enters the first water outlet 13 on the first flow channel 11, and the water flow in the first flow channel 11 enters the first sub-flow channel 211 of the second flow channel 21 through the second water inlet 22 because the first water outlet 13 is in sealing connection with the second water inlet 22, flows out of the second water outlet 23 of the second flow channel 21 after flowing through the first sub-flow channel 211, the second sub-flow channel 212 and the first sub-flow channel 213, enters the first water inlet 12 of the first flow channel 11, and finally enters the water outlet main port 15 of the first flow channel 11 to leave the battery box body.

In summary, the embodiment of the utility model provides a battery box and a battery pack, which avoid arranging a conventional pipeline structure by abutting and connecting a first water inlet 12 and a first water outlet 13 on a bottom plate 1 with a second water outlet 23 and a second water inlet 22 on a frame 2, solve the problems of installation, weight, cost and the like of the battery box, achieve the purposes of improving the strength and the mode of the box, stabilizing the structure of the box, and simultaneously play a role of reducing weight, and save the part cost and the installation cost of an external water pipe and a connector on the premise of not influencing the liquid cooling function of the battery box.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. A battery box, comprising:

a bottom plate having a first flow passage, a first water inlet and a first water outlet in communication with the first flow passage;

a frame connected to the base plate and defining with the base plate a receiving location for receiving a battery, the frame having a second flow passage and a second water inlet and a second water outlet in communication with the second flow passage;

the first water inlet and the first water outlet are arranged on the surface of the bottom plate, which is attached to the frame, the second water inlet and the second water outlet are arranged on the surface of the frame, which is attached to the bottom plate, the first water inlet is in sealing connection with the second water outlet, and the second water inlet is in sealing connection with the first water outlet so as to be communicated with the first runner and the second runner.

2. The battery compartment of claim 1, further comprising a first seal, a second seal; the first sealing piece is arranged at the joint of the first water inlet and the second water outlet so as to be in sealing connection with the first water inlet and the second water outlet; the second sealing piece is arranged at the joint of the second water inlet and the first water outlet so as to be in sealing connection with the second water inlet and the first water outlet.

3. The battery box of claim 1, wherein the second water outlet is inserted into the first water inlet, and the second water inlet is inserted into the first water outlet; the inner diameter of the first water inlet is R11, the inner diameter of the first water outlet is R12, the outer diameter of the second water outlet is L21, and the outer diameter of the second water inlet is L22; wherein, L21/R11 is more than or equal to 0.9 and less than or equal to 0.998,0.9, L22/R12 is more than or equal to 0.998.

4. The battery box of claim 1, wherein the first water inlet is inserted into the second water outlet, and the first water outlet is inserted into the second water inlet; the outer diameter of the first water inlet is L11, the outer diameter of the first water outlet is L12, the inner diameter of the second water outlet is R21, and the inner diameter of the second water inlet is R22; wherein, L111/R21 is more than or equal to 0.9 and less than or equal to 0.998,0.9, L12/R22 is more than or equal to 0.998.

5. The battery box of any one of claims 1-4, wherein the second flow channel comprises a first flow subchannel and a second flow subchannel;

the frame comprises:

a frame defining a receiving space;

a beam frame which is arranged in the accommodating space and separates the accommodating space to form the Rong Zhiwei; the frame is internally provided with a first sub-runner, the beam frame is internally provided with a second sub-runner, and the first sub-runner is communicated with or not communicated with the second sub-runner.

6. The battery box of claim 5, wherein the beam comprises: a first beam, a second beam, the first beam being arranged crosswise to the second beam; the second sub-runner comprises a first sub-runner and a second sub-runner, and the first sub-runner is arranged in the first beam and/or the second sub-runner is arranged in the second beam.

7. The battery box according to claim 6, wherein a first opening is formed at two ends of the first beam, a second opening is formed at a corresponding position of the second beam, the first opening is in sealing connection with the second opening, and the first sub-runner is communicated with the second sub-runner;

third openings are formed in the two ends of the second beam, fourth openings are formed in corresponding positions of the frames, and the third openings are in sealing connection with the fourth openings so as to be communicated with the first sub-runners and the second sub-runners.

8. The battery box according to claim 1, wherein the bottom plate is provided with a water inlet port and a water outlet port, the water inlet port is used for introducing the cooling liquid from the outside to the first flow channel, and the water outlet port is used for leading the cooling liquid from the first flow channel to the outside.

9. The battery box of claim 8, wherein the base plate comprises:

a first plate to which the frame is attached;

the first plate cover is arranged on the second plate, a first flow channel is defined between the first plate and the second plate, and the first water inlet, the first water outlet, the water inlet total port and the water outlet total port are all arranged on the first plate.

10. A battery pack, comprising:

the battery case according to any one of claims 1 to 9;

and the battery is arranged in the accommodating position of the battery box body.