CN215184269U

CN215184269U - Battery box structure, battery module, battery package and vehicle

Info

Publication number: CN215184269U
Application number: CN202121582502.1U
Authority: CN
Inventors: 张新宾; 张占江; 李阳; 赵豪儒; 杨明; 曹云飞
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2021-12-14
Anticipated expiration: 2031-07-13

Abstract

The utility model discloses a battery box structure, battery module, battery package and vehicle relates to electric automobile technical field. The battery box structure includes: the battery box body is internally provided with a battery bin for containing the battery core and comprises a side plate arranged along the circumferential direction of the battery core, and the side plate is arranged into a hollow structure to form a first cooling liquid containing cavity; and the inlet of the electromagnetic valve is communicated with the first cooling liquid accommodating cavity, and the outlet of the electromagnetic valve is communicated with the battery bin. The utility model discloses can enough carry out good heat preservation to the battery, can effectively restrain the battery thermal runaway again.

Description

Battery box structure, battery module, battery package and vehicle

Technical Field

The utility model relates to an electric automobile technical field especially relates to a battery box structure, battery module, battery package and vehicle.

Background

For the battery used by the electric automobile, because the performance of the battery, especially the performance of the battery cell, can be seriously reduced in the low-temperature environment in winter, in the prior art, a heat insulation layer is often arranged outside the battery cell to insulate the battery cell. This kind of insulation construction is comparatively simple, but the battery not only has the heat preservation problem, still has thermal runaway risk. In such a thermal insulation structure, if thermal runaway occurs in the battery, it is difficult to suppress the thermal runaway, and there is a possibility that heat dissipation may be inhibited.

Accordingly, there is a need for a battery case structure, a battery module, a battery pack, and a vehicle to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery box structure, battery module, battery package and vehicle can enough carry out good heat preservation to the battery, can effectively restrain the battery thermal runaway again.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a battery box structure, it includes:

the battery box body is internally provided with a battery bin for containing an electric core and comprises a side plate arranged along the circumferential direction of the electric core, and the side plate is arranged to be a hollow structure so as to form a first cooling liquid containing cavity;

and an inlet of the electromagnetic valve is communicated with the first cooling liquid accommodating cavity, and an outlet of the electromagnetic valve is communicated with the battery compartment.

Optionally, the battery box structure further comprises a water pump, and the first cooling liquid accommodating cavity is communicated with an inlet of the electromagnetic valve through the water pump.

Optionally, an electric device bin is further arranged inside the battery box body, the electric device bin and the battery bin are arranged in a separated mode, and the electromagnetic valve and the water pump are installed in the electric device bin.

Optionally, the battery box further includes a bottom plate disposed at the bottom of the electric core, the bottom plate is disposed in a hollow structure to form a second cooling liquid accommodating cavity, and an inlet of the electromagnetic valve is communicated with the second cooling liquid accommodating cavity.

Optionally, the first cooling liquid containing cavity is communicated with the second cooling liquid containing cavity.

Optionally, a cooling liquid filling port is formed in the side plate, the cooling liquid filling port is communicated with the first cooling liquid accommodating cavity, and a waterproof breathable film is arranged on an upper cover of the cooling liquid filling hole.

Optionally, the battery box structure further comprises a heater for heating the coolant in the first coolant accommodating chamber.

The utility model also provides a battery module, it includes electric core and as above battery box structure, electric core installs in the battery compartment.

The utility model also provides a battery package, it includes battery management system and as above the battery module, battery management system with the solenoid valve communication is connected, in order to control opening and close of solenoid valve.

The utility model also provides a vehicle, it includes as above the battery package.

The utility model has the advantages that:

the utility model provides a battery box structure, battery module, battery package and vehicle under winter low temperature environment, add the coolant liquid in holding the chamber to first coolant liquid, can cool off the electric core in the work through the coolant liquid, guarantee battery normal operating. And after the vehicle stops, the heat energy stored in the cooling liquid can be slowly released, and the heat preservation effect is achieved on the battery cell. On above basis, if the battery takes place thermal runaway, through opening the solenoid valve, can make the coolant liquid in the first coolant liquid holds the chamber by the solenoid valve flow in the battery compartment to effectively restrain thermal runaway, prevent that thermal runaway from stretching.

Drawings

Fig. 1 is a schematic overall structure diagram of a battery box structure provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery box structure and a battery cell connection provided by an embodiment of the present invention;

fig. 3 is a schematic perspective exploded view of a battery box according to an embodiment of the present invention;

fig. 4 is a schematic view of a partial cross-sectional structure of a connection between a left side plate and a bottom plate in a battery box provided by an embodiment of the present invention;

fig. 5 is a schematic view of a partial cross-sectional structure of a connection between a front side plate and a bottom plate in a battery box provided by an embodiment of the present invention.

In the figure:

100. an electric core;

1. a battery case; 11. a front side plate; 111. a coolant filling port; 12. a rear side plate; 13. a left side plate; 131. inserting a tube; 14. a right side plate; 15. a base plate; 151. a jack; 152. a sealing strip; 16. a partition plate; 2. a battery compartment; 3. an electrical device compartment; 4. an electromagnetic valve; 5. a water pump; 6. a liquid inlet pipe; 7. a heater; 8. a liquid outlet pipe.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The present embodiment provides a battery case structure, as shown in fig. 1 and 2, which includes a battery case 1 and a solenoid valve 4. Wherein, the battery box 1 is provided with a battery compartment 2 therein, and the battery core 100 is accommodated in the battery compartment 2. The battery box 1 itself includes a side plate, the side plate is disposed along the circumferential direction of the battery cell 100, and the side plate is disposed in a hollow structure to form a first cooling liquid accommodating chamber. The inlet of solenoid valve 4 and first coolant liquid hold the chamber intercommunication, and the export of solenoid valve 4 and battery compartment 2 intercommunication.

According to the setting, under winter low temperature environment, add the coolant liquid in to first coolant liquid holds the chamber, can cool off electric core 100 in the work through the coolant liquid, guarantee battery normal operating. Since the specific heat capacity of the coolant is large, the coolant can store a large amount of thermal energy. After the vehicle stops, the heat energy stored in the cooling liquid can be slowly released, and the heat preservation effect on the battery core 100 is achieved.

Further, if the battery takes place thermal runaway, through opening solenoid valve 4, can make the coolant liquid in the first coolant liquid holding chamber flow into in battery compartment 2 by solenoid valve 4 to effectively restrain thermal runaway, prevent that thermal runaway from stretching. In this embodiment, the electromagnetic valve 4 is set to a normally closed electromagnetic valve, which is closed when the battery operates normally, and does not allow the coolant to flow out.

Optionally, in order to facilitate the addition of the cooling liquid into the first cooling liquid accommodating cavity, a cooling liquid filling port 111 is formed in the side plate, and the cooling liquid filling port 111 is communicated with the first cooling liquid accommodating cavity. Further, a waterproof and breathable film is covered on the coolant filling port 111. After the coolant liquid is filled, the waterproof breathable film cover is arranged on the coolant liquid filling port 111, so that the air pressure balance between the first coolant liquid accommodating cavity and the outside can be guaranteed. In this embodiment, the waterproof breathable film is fixed on the side plate in a sticking manner.

As for the specific structure of the side panels, as shown in fig. 3, it is a rectangular frame structure including a front side panel 11, a rear side panel 12, a left side panel 13 and a right side panel 14. In this embodiment, preceding curb plate 11, posterior lateral plate 12, left curb plate 13 and right curb plate 14 all have along the well cavity that self length direction set up, and the well cavity intercommunication of four forms first coolant liquid and holds the chamber, and first coolant liquid holds the chamber and sets up around the circumference of electric core 100 to can fully cool off electric core 100 effectively.

Alternatively, the coolant filler port 111 is provided on the front side plate 11 for ease of use. Of course, in other embodiments, the coolant filler port 111 may be provided on the rear side plate 12 or other side plates. The number of the coolant filler 111 can be adjusted as needed in addition to the installation position.

As shown in fig. 3, the battery case 1 further includes a bottom plate 15 in addition to the side plates, and the bottom plate 15 is disposed at the bottom of the battery cell 100. Similarly to the arrangement of the side plates, the bottom plate 15 is provided as a hollow structure to form a second cooling liquid accommodating chamber, and the inlet of the solenoid valve 4 communicates with the second cooling liquid accommodating chamber. According to this, can increase the holistic coolant liquid storage capacity of battery box 1 through setting up the second coolant liquid and holding the chamber to make newly-increased coolant liquid act on electric core 100 bottom, improve cooling, keep warm or restrain the thermal runaway effect.

Further, the first cooling liquid containing cavity is communicated with the second cooling liquid containing cavity. At the moment, the coolant can be filled into any one coolant containing cavity, and the coolant in the other coolant containing cavity can be filled, so that the coolant filling times are reduced, and the filling efficiency is improved.

In this embodiment, in order to communicate the first cooling liquid accommodating chamber and the second cooling liquid accommodating chamber, the following arrangement is made: referring to fig. 3 and 4, insertion tubes 131 are disposed at a portion of the left side plate 13 connected to the bottom plate 15 and a portion of the right side plate 14 connected to the bottom plate 15, insertion holes 151 are disposed at both left and right sides of the bottom plate 15, and the insertion tubes 131 are hermetically inserted into the insertion holes 151 so that the cooling liquid flows between the first cooling liquid accommodating chamber and the second cooling liquid accommodating chamber.

Further, referring to fig. 3 and 5, the bottom plate 15 is provided with sealing strips 152 on the front and rear sides thereof, and the two sealing strips 152 are used for sealing the front and rear sides of the bottom plate 15, so that the cooling liquid flows only through the insertion hole 151 and the insertion tube 131.

In other respects, the side plates and the bottom plate 15 are all made of aluminum by an aluminum extrusion molding process for the battery case body 1. All parts of the battery box body 1 are connected through friction stir welding and arc welding so as to ensure the structural strength and the sealing property.

Optionally, as shown in fig. 1, the battery box structure further includes a water pump 5, and the first coolant accommodating chamber is communicated with the inlet of the solenoid valve 4 through the water pump 5. Therefore, the cooling liquid can be supplied more quickly through the water pump 5, and the working efficiency is improved. More specifically, the water pump 5 has a water pump inlet and a water pump outlet. Meanwhile, a liquid inlet pipe 6 and a liquid outlet pipe 8 are also arranged in the battery box body structure. Wherein, the water pump import holds the chamber intercommunication through feed liquor pipe 6 and first coolant liquid, and the water pump export then holds the chamber intercommunication through drain pipe 8 and first coolant liquid to can form coolant liquid circulation pipeline.

In this embodiment, since the first cooling liquid housing chamber and the second cooling liquid housing chamber are communicated, only one water pump 5 is provided in the battery case structure to simplify the structure. In addition, the electromagnetic valve 4 is connected with the water pump 5 through a liquid outlet pipe 8.

Optionally, as shown in fig. 1, an electrical component bin 3 is further disposed inside the battery box body 1, the electrical component bin 3 is separated from the battery bin 2, and the electromagnetic valve 4 and the water pump 5 are both installed in the electrical component bin 3. Therefore, when the battery is out of control due to thermal runaway and the cooling liquid is injected into the battery bin 2, the cooling liquid can be prevented from entering the electric device bin 3, and the normal work of the water pump 5 and the electromagnetic valve 4 is ensured.

In the aspect of specific structure, a clapboard 16 is arranged in the battery box body 1, and the clapboard 16 divides the inner cavity of the battery box body 1 into a battery chamber 2 and an electric device chamber 3. In this embodiment, one end of the partition 16 in the longitudinal direction is connected to the left side plate 13, and the other end of the partition 16 in the longitudinal direction is connected to the right side plate 14.

Optionally, as shown in fig. 1, the battery case structure further includes a heater 7. The cooling liquid in the first cooling liquid containing cavity can be heated by the heater 7, so that when the temperature in the battery is lower than the preset temperature, the temperature in the battery is increased to the preset temperature and is kept, and the heat preservation effect is further enhanced.

In this embodiment, the heater 7 is installed on the liquid inlet pipe 6. At this moment, when the coolant liquid flows through feed liquor pipe 6, can heat the coolant liquid through heater 7 earlier, and water pump 5 is sent into to the coolant liquid after rethread feed liquor pipe 6 will heat, and the coolant liquid after will heating is sent into first coolant liquid through water pump 5 at last and holds the intracavity, reinforcing heat preservation effect. Preferably, the heater 7 may be a coolant heater specifically designed for a vehicle. Since the structure of the coolant heater is prior art, it is not described in detail herein.

To sum up, this embodiment provides a battery box structure, and it has following advantage:

(1) the heat preservation performance is good, and the heat preservation material is particularly suitable for low-temperature environments in winter. Specifically, during normal operation of the battery, heat generated by the battery can be absorbed by the cooling liquid; after the vehicle stops, the heat energy stored in the cooling liquid can be slowly released, and the temperature in the battery pack is kept unchanged. If the temperature in the battery pack is still lower than the preset temperature, the heater 7 may be activated to heat the coolant to maintain the temperature in the battery pack at the preset temperature.

(2) Can effectively inhibit thermal runaway. When the battery takes place thermal runaway, accessible water pump 5 takes out the coolant liquid in the battery box 1, makes in the coolant liquid gets into battery compartment 2 through solenoid valve 4 again, cools off electric core 100, prevents that thermal runaway from stretching.

Example two

The embodiment further provides a battery module, which includes a battery cell 100 and the battery box structure according to the first embodiment. Wherein the battery cells 100 are mounted in the battery compartment 2. Specifically, the number of the battery cells 100 may be one, or may be multiple. Overall, through above setting up the heat preservation effect that both can improve battery module, guarantee battery module's normal operating under the low temperature environment, can in time inject the coolant liquid into battery compartment 2 when electric core 100 takes place the thermal runaway again, effectively restrain the thermal runaway.

The embodiment also provides a battery pack which comprises the battery module. Besides the battery module, the battery pack also comprises a battery management system. The battery management system is in communication connection with the electromagnetic valve 4 to control the opening and closing of the electromagnetic valve 4. Further, a temperature measuring mechanism is further arranged in the battery pack, and the temperature measuring mechanism is used for detecting the temperature of the battery core 100 so as to judge whether the battery core 100 is out of thermal runaway. The battery management system is in communication connection with the temperature measuring mechanism to receive the temperature information of the battery core 100, and the electromagnetic valve 4 is opened when the battery core 100 is out of thermal runaway according to the temperature information, so that automatic operation of thermal runaway suppression is realized.

Optionally, the battery management system is further connected with the water pump 5 and the heater 7, respectively, to control the operation of the water pump 5 and the heater 7. Since the structure of the battery management system is the prior art, it is not described herein in detail.

The present embodiment also provides a vehicle including the battery pack as described above. Specifically, the vehicle includes a vehicle body in which a battery pack is mounted.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A battery case structure, comprising:

the cooling system comprises a battery box body (1), wherein a battery bin (2) is arranged in the battery box body (1) to contain an electric core (100), the battery box body (1) comprises side plates arranged along the circumferential direction of the electric core (100), and the side plates are arranged to be hollow structures to form a first cooling liquid containing cavity;

the inlet of the electromagnetic valve (4) is communicated with the first cooling liquid accommodating cavity, and the outlet of the electromagnetic valve (4) is communicated with the battery bin (2).

2. The battery box structure according to claim 1, further comprising a water pump (5), wherein the first coolant receiving chamber is communicated with an inlet of the solenoid valve (4) through the water pump (5).

3. The battery box structure according to claim 2, wherein an electric device bin (3) is further arranged in the battery box (1), the electric device bin (3) and the battery bin (2) are arranged in a separated mode, and the electromagnetic valve (4) and the water pump (5) are both arranged in the electric device bin (3).

4. The battery box structure according to claim 1, wherein the battery box (1) further comprises a bottom plate (15) disposed at the bottom of the battery cell (100), the bottom plate (15) is disposed in a hollow structure to form a second cooling liquid accommodating cavity, and the inlet of the electromagnetic valve (4) is communicated with the second cooling liquid accommodating cavity.

5. The battery case structure according to claim 4, wherein the first coolant accommodating chamber and the second coolant accommodating chamber communicate.

6. The battery box structure according to claim 1, wherein a coolant filling opening (111) is formed in the side plate, the coolant filling opening (111) is communicated with the first coolant accommodating cavity, and a waterproof and breathable film is arranged on an upper cover of the coolant filling hole.

7. The battery case structure according to claim 1, further comprising a heater (7), the heater (7) being for heating the coolant in the first coolant accommodating chamber.

8. A battery module comprising electric cells (100), characterized in that it further comprises a battery case structure according to any of claims 1-7, the electric cells (100) being mounted in the battery compartment (2).

9. A battery pack comprising a battery management system, wherein the battery pack further comprises the battery module according to claim 8, and the battery management system is in communication connection with the solenoid valve (4) to control the on/off of the solenoid valve (4).

10. A vehicle characterized by comprising the battery pack according to claim 9.