CN220710459U - Battery pack box, battery pack and automobile - Google Patents

Abstract

The utility model provides a battery pack box body, a battery pack and an automobile, and relates to the technical field of automobile parts. During cooling circulation, the outside water pipe and the liquid cooling plate are connected through the runner inside the side plate, the outside water pipe and the liquid cooling plate are connected through the quick water inserting pipe inside the box body, occupation of BDU space is avoided, in addition, due to the fact that one runner, for example, the water inlet runner is provided with a valve, when the battery cell is not required to be cooled and radiated, the valve can be closed, cooling liquid is prevented from entering the liquid cooling plate, and energy waste is avoided.

Description

Battery pack box, battery pack and automobile

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a battery pack box, a battery pack and an automobile.

Background

With the continuous development of new energy automobile technology, energy density requirements and cost control of battery packs by various automobile manufacturers are higher and higher, more battery cells are required to be arranged in a limited box space as much as possible to improve the energy density, and arrangement space of BDUs (Battery Distribution Unit, battery control units) is ensured, and the space is generally divided into a battery cell space and a BDU space by a partition plate in the box of the battery packs. As shown in fig. 1, the front side plate of the box body of most of the current battery packs is provided with a fast-insertion water pipe 11 and a fast-insertion water outlet pipe 12 in a penetrating manner, the fast-insertion water pipe 11 and the fast-insertion water outlet pipe 12 are communicated with a liquid cooling plate (a bottom plate of the box body) at the bottom of a space of the BDU, so that cooling of the battery packs is realized, the battery packs are always in a reasonable temperature range, but the fast-insertion water pipe 11 and the fast-insertion water outlet pipe 12 occupy a large space in the box body, so that the BDU is difficult to arrange, the assembly space is insufficient, and if the BDU needs to have enough arrangement space, the space of a battery cell needs to be reduced, and the energy density of the battery packs is reduced. In addition, the fast water pipe is high in cost, so that the overall cost of the battery pack rises, meanwhile, the flow of the cooling liquid cannot be controlled, and unnecessary energy consumption can be caused when the battery pack does not need to be cooled.

Disclosure of Invention

The present utility model aims to solve at least one of the above technical problems.

In order to solve the above problems, the utility model provides a battery pack case, which comprises a side plate and a liquid cooling plate used as a bottom plate of the battery pack case, wherein the side plate is vertically arranged on the periphery side of the liquid cooling plate, the battery pack case further comprises a valve, two flow channels are arranged in the side plate, one ports of the two flow channels are positioned on the outer side wall of the side plate, the other ports of the two flow channels are respectively communicated with the inner part of the liquid cooling plate, and the valve is arranged on the side plate and is at least partially positioned in one of the flow channels.

Compared with the prior art, the battery pack box provided by the utility model has the following technical effects:

the liquid cooling board can be the bottom plate of battery package box, and the curb plate is connected perpendicularly in the liquid cooling board week side, in addition, the inside of the curb plate of this battery package box (can be the inside of the preceding curb plate of battery package box) is provided with two runners, two runners can be intake runner and play water runner respectively, an opening of intake runner is located the lateral wall of curb plate (that is the lateral wall of curb plate keeping away from battery package box inner space), and then can make an opening of intake runner and outside inlet tube intercommunication, another port of intake runner sets up in the one end of curb plate orientation liquid cooling board, so can realize when curb plate and liquid cooling board are connected fixedly, just realize another port of intake runner and the inside intercommunication of liquid cooling board, and similarly, an opening of play water runner is located the lateral wall of curb plate, and then can communicate with outside outlet pipe, another port of play water runner and the inside intercommunication of liquid cooling board. Therefore, when the external water inlet pipe outputs cooling liquid, the cooling liquid can enter the liquid cooling plate through the water inlet flow channel, and after heat transferred by the battery cell is absorbed in the liquid cooling plate, the cooling liquid flows to the external water outlet pipe from the water outlet flow channel, so that cooling circulation is completed. In the whole cooling circulation process, the external water pipe and the liquid cooling plate are connected through the runner inside the side plate, the external water pipe and the liquid cooling plate are connected through the quick water pipe inside the box body, the cost is low, occupation of the space (particularly BDU space) in the box body is avoided, the BDU can be provided with enough space arrangement, in addition, due to the fact that one runner, for example, the water inlet runner is provided with a valve, when the battery cell is not required to cool and dissipate heat, the valve is closed, cooling liquid is prevented from entering the liquid cooling plate, and energy waste is avoided.

Further, the inner side wall of the side plate is provided with a concave cavity, and the valve is installed at the bottom of the concave cavity and at least partially positioned in one of the flow channels.

Further, the battery pack case further includes a temperature sensor mounted at the bottom of the concave cavity and at least partially located in the other of the flow channels.

Further, the curb plate is including curb plate body and the die-casting board that is connected, the curb plate body is provided with the installation breach, the die-casting board set up in installation breach department, just the die-casting board orientation the inside one side of battery package box has the cavity.

Further, the battery pack box body further comprises a sealing ring, one end of the side plate, which faces the liquid cooling plate, is provided with a sealing groove corresponding to the flow channel, or the position, corresponding to the flow channel, of the liquid cooling plate is provided with the sealing groove, and the sealing ring is arranged in the sealing groove.

Further, the side plate is provided with a reinforcing lug towards one end of the liquid cooling plate in an outward protruding mode, and the reinforcing lug is connected with the liquid cooling plate.

Further, the battery pack box body further comprises two water pipe connectors, wherein the two water pipe connectors are installed on the outer sides of the side plates and are respectively inserted into the corresponding flow channels.

Further, the valve comprises a valve seat and a shutoff piston, wherein the valve seat is mounted on the side plate, the shutoff piston is movably connected with the valve seat, and the shutoff piston is used for being moved out of the flow channel or at least partially inserted into the flow channel.

The utility model also provides a battery pack, which comprises the battery pack box body.

The technical improvement and the technical effect of the battery pack are the same as those of the battery pack box body, so that the battery pack is not repeated.

The utility model also provides an automobile comprising the battery pack.

Since the technical improvement and technical effect of the automobile are the same as those of the battery pack, the automobile will not be described in detail.

Drawings

FIG. 1 is a schematic diagram of a prior art battery pack case connected to a quick-connect water pipe and a quick-connect water pipe;

fig. 2 is a schematic structural view of a battery pack case according to an embodiment of the present utility model;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;

FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 3;

FIG. 6 is a schematic view of the structure of a die-cast plate according to an embodiment of the present utility model from an inside view;

FIG. 7 is a schematic view of the structure of a die-cast plate according to an embodiment of the present utility model from an outside view;

FIG. 8 is a schematic view of a valve closing mode of an embodiment of the present utility model, wherein the arrow direction is the coolant flow direction;

FIG. 9 is a schematic view of a half-open valve mode according to an embodiment of the present utility model, wherein the arrow direction is the coolant flow direction;

fig. 10 is a schematic structural view of a fully opened valve according to an embodiment of the present utility model, wherein the arrow direction is the flow direction of the coolant.

Reference numerals illustrate:

11. quickly inserting into the water pipe; 12. quickly inserting a water outlet pipe; 21. a side plate; 211. a die-casting plate; 2111. a cavity; 2112. a flow passage; 2113. sealing grooves; 2114. a water pipe joint mounting hole; 2115. a valve mounting hole; 2116. a sensor mounting hole; 2117. a bump; 212. a side plate body; 22. a left side plate; 23. a right side plate; 24. a rear side plate; 25. a liquid cooling plate; 251. a liquid cooling plate water inlet; 252. a water outlet of the liquid cooling plate; 26. a partition plate; 27. a water pipe joint; 28. a valve; 281. a shut-off piston; 29. a temperature sensor; 30. and (3) sealing rings.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", etc. are based on the directions or positional relationships 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 constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Moreover, the X-axis represents the longitudinal direction, that is, the front-rear direction, and the positive direction of the X-axis represents the front and the negative direction of the X-axis represents the rear; the Y-axis represents lateral, i.e., left-right, direction, and the positive direction of the Y-axis represents left, and the negative direction of the Y-axis represents right; the Z-axis represents vertical, i.e., up-down, and the positive direction of the Z-axis represents up and the negative direction of the Z-axis represents down. It should also be noted that the foregoing Y-axis and Z-axis are meant to be illustrative of the present utility model and to simplify the description, and are not intended to indicate or imply that the devices or elements referred to must be in a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Referring to fig. 4, a battery pack case according to an embodiment of the present utility model includes a side plate 21, a valve 28, and a liquid cooling plate 25 serving as a bottom plate of the battery pack case, wherein the side plate 21 is vertically disposed on the liquid cooling plate 25, two flow channels 2112 are disposed in the side plate 21, one ports of the two flow channels 2112 are located at an outer side wall of the side plate 21, another port of the two flow channels 2112 is located at an end of the side plate 21 facing the liquid cooling plate 25, and another port of the two flow channels 2112 is respectively communicated with the interior of the liquid cooling plate 25, and the valve 28 is mounted on the side plate 21 and is at least partially located in one of the flow channels 2112.

In this embodiment, the liquid cooling plate 25 may be a bottom plate of a battery pack case, and the side plate 21 is vertically connected to a peripheral side of the liquid cooling plate 25, in addition, two flow channels 2112 are provided in an interior of the side plate 21 of the battery pack case (may be an interior of a front side plate of the battery pack case), the two flow channels 2112 may be a water inlet flow channel and a water outlet flow channel respectively, one port of the water inlet flow channel is located on an outer side wall of the side plate 21 (i.e., a side wall of the side plate 21 far away from an inner space of the battery pack case), so that one port of the water inlet flow channel is communicated with an external water inlet pipe, and the other port of the water inlet flow channel is disposed at one end of the side plate 21 facing the liquid cooling plate 25, so that when the side plate 21 is fixedly connected to the liquid cooling plate 25, the other port of the water inlet flow channel is communicated with the interior of the liquid cooling plate 25, and similarly, one port of the water outlet flow channel is located on an outer side wall of the side plate 21, so that it can be communicated with an external water outlet pipe, and the interior of the liquid cooling plate 25. Thus, when the external water inlet pipe outputs cooling liquid, the cooling liquid can enter the liquid cooling plate 25 through the water inlet flow channel, and after the heat transferred by the electric core is absorbed in the liquid cooling plate 25, the cooling liquid flows to the external water outlet pipe from the water outlet flow channel, so that the cooling circulation is completed. In the whole cooling circulation process, the external water pipe and the liquid cooling plate 25 are internally connected through the runner 2112 in the side plate 21, the external water pipe and the liquid cooling plate 25 are not required to be internally connected through the quick water pipe in the box body, the cost is low, occupation of the space (particularly BDU space) in the box body is avoided, the BDU can be arranged in a sufficient space, in addition, as one runner 2112 is provided with the valve 28 at the water inlet runner, when the battery core is not required to be cooled and radiated, the valve 28 can be closed, and then cooling liquid is prevented from entering the liquid cooling plate 25, so that energy waste is avoided.

In the present embodiment, the mounting position of the valve 28 is not limited, and may be mounted on the outer side of the side plate 21, or may be mounted on the inner side of the side plate 21, and may be selected according to practical situations.

Referring to fig. 2, optionally, the side plate 21 includes a front side plate, and further includes a left side plate 22, a right side plate 23, a rear side plate 24, and a partition plate 26, where the partition plate 26, the left side plate 22, the right side plate 23, and the rear side plate 24 enclose to form a cell space, and the partition plate 26, the left side plate 22, the right side plate 23, and the front side plate enclose to form the BDU space. The flow channel 2112 may be provided in the front side plate.

In this embodiment, the partition plate 26, the left side plate 22, the right side plate 23 and the rear side plate 24 enclose to form a battery cell space, and the partition plate 26, the left side plate 22, the right side plate 23 and the front side plate enclose to form a BDU space, wherein the battery cell space can be divided into a plurality of battery cell unit spaces through longitudinal beams and transverse beams. The left side of the die-casting plate 211 is connected with the left side plate 22 through a side plate body 212, and the right side of the die-casting plate 211 is connected with the right side plate 23 through a side plate body 212.

Referring to fig. 2 to 6, optionally, the side plate 21 is provided with a cavity 2111 on the inner side wall (the side wall facing the inner space of the battery pack case), and the valve 28 is installed at the bottom of the cavity 2111 and is at least partially inserted into one of the flow channels 2112.

In this embodiment, the inner side wall of the side plate 21 is provided with a cavity 2111, for example, the inner side wall of the front side plate, that is, the rear side wall of the front side plate is provided with the cavity 2111, so that the valve 28 can be installed at the bottom of the cavity 2111 and inserted into the water inlet channel. Thus, by installing the valve 28 in the battery pack case, the outside can be prevented from having a space for the valve 28, and the valve 28 can also be an electromagnetic control valve which can be electrically connected with the BMS battery management system inside the battery pack) through the wire harness, and thus the opening and closing of the valve 28 can be controlled by the BSM.

In addition, since the valve 28 is installed at the bottom of the cavity 2111, at least part of the valve 28 does not occupy the original BDU space, and at most, the rear end of the valve 28 extends out of the cavity 2111 and enters the original BDU space, so that the arrangement of the BDU is hardly affected.

Referring to fig. 3 and 5, the battery pack case further includes a temperature sensor 29, and the temperature sensor 29 is mounted to the bottom of the cavity 2111 and is at least partially inserted into the other flow channel 2112.

In this embodiment, the valve 28 is not only an electromagnetic control valve, but also a flow rate regulating valve, and includes a valve seat and a shutoff piston 281, the valve seat is mounted on the side plate 21, the shutoff piston 281 is movably connected with the valve seat, and the shutoff piston 281 is used for being removed from the flow channel 2112 or at least partially inserted into the flow channel 2112. The outlet flow passage is further provided with a temperature sensor 29 for detecting the temperature of the cooling liquid flowing through the outlet flow passage, the temperature sensor 29 is electrically connected with the BMS, the opening of the valve 28 is adjusted by the expansion and contraction of the shutoff piston 281 of the valve 28 for controlling the flow of the cooling liquid in the liquid cooling plate 25, the size and opening and closing of the inlet flow passage are further adjusted, and the valve 28 is provided with a closing mode, a half-opening mode and a full-opening mode, and the outlet temperature is monitored through the temperature sensor 29. When the vehicle is in the fuel mode, the BMS monitors the temperature in the battery pack, and when the temperature of the battery core (the temperature of the battery core is detected by a special sensor in the BMS) and the temperature of the water outlet are normal, the BMS can input a closing signal to the valve 28, the shutoff piston 281 of the valve 28 is in the maximum extending state, enters the closing mode shown in fig. 8, and closes the water inlet flow passage, so that the circulation of cooling liquid in the battery pack is blocked, and the energy consumption is reduced. When the vehicle is in a pure electric mode or a hybrid mode, such as the temperature of an electric core or the temperature of water outlet is increased, the BMS can input a half-open signal to the valve 28, the shutoff piston 281 of the valve 28 is contracted for a certain stroke, the water inlet flow passage is opened, the half-open mode shown in fig. 9 is entered, and the temperature in the bag is reduced through cooling liquid; when the temperature of the battery cell or the temperature of the water outlet rises sharply, the BMS can input a full-open signal to the valve 28, the shut-off piston 281 of the valve 28 is fully retracted, that is, removed from the water inlet channel, and the valve 28 enters a full-open mode as shown in fig. 10, and the water inlet channel is fully opened to perform rapid cooling.

In addition, the temperature sensor 29 is also installed at the bottom of the cavity 2111, like the valve 28, at least part of the temperature sensor 29 does not occupy the original BDU space, and at most, the rear end of the temperature sensor 29 extends out of the cavity 2111 and enters the original BDU space, so that the arrangement of the BDU is hardly affected.

Referring to fig. 2-3 and 6-7, optionally, the side plate 21 includes a side plate body 212 and a die-casting plate 211 connected to each other, the side plate body 212 is provided with a mounting notch, the die-casting plate 211 is disposed at the mounting notch, and a side of the die-casting plate 211 facing the interior of the case has the cavity 2111.

In this embodiment, the side plate 21 includes a side plate body 212 and a die-casting plate 211, the side plate body 212 is the same as the side plate 21 of the conventional battery pack, the side plate 21 is a closed annular structure, the side plate body 212 is an unclosed annular structure, and has an installation notch, and after the die-casting plate 211 is installed in the installation notch, the die-casting plate 211 and the side plate body 212 together form a closed annular structure. The mounting notch of the side plate body 212 is specifically located at the front side plate, and the die-casting plate 211 is a die-casting piece, so that the cavity 2111 and the two inner flow channels 2112 are integrally formed, and the forming is simpler and the cost is lower. A valve mounting hole 2115 and a sensor mounting hole 2116 which are communicated with the two flow channels 2112 can be respectively arranged at the bottom of the cavity 2111, a valve 28 is arranged at the valve mounting hole 2115 in a sealing way, and a temperature sensor 29 is arranged at the sensor mounting hole 2116 in a sealing way.

Referring to fig. 4-6, optionally, the battery pack case further includes a sealing ring 30, a sealing groove 2113 corresponding to the flow channel 2112 is provided at an end of the side plate 21 facing the liquid cooling plate 25, or a sealing groove 2113 is provided at a position of the liquid cooling plate 25 corresponding to the flow channel 2112, and the sealing ring 30 is disposed on the sealing ring.

In this embodiment, during die casting, two sealing grooves 2113 may be formed simultaneously, and the sealing grooves 2113 are concentrically arranged with the bottom end ports of the corresponding flow channels 2112, so that when the side plate 21 is fixed with the liquid cooling plate 25, the sealing ring 30 mounted at the sealing groove 2113 is compressed, thereby realizing sealing effect and preventing leakage of cooling liquid from the junction of the side plate 21 and the liquid cooling plate 25.

4-5, a liquid cooling plate water inlet 251 and a liquid cooling plate water outlet 252 are disposed on the upper side of the liquid cooling plate 25, the liquid cooling plate water inlet 251 is abutted and communicated with the bottom end opening of the water inlet flow channel, and the liquid cooling plate water outlet 252 is abutted and communicated with the bottom end opening of the water outlet flow channel. In other embodiments, seal grooves 2113 may also be provided at the liquid cooling plate water inlet 251 and liquid cooling plate water outlet 252.

Referring to fig. 4-7, optionally, an end of the side plate 21 facing the liquid cooling plate 25 is provided with a reinforcing protrusion 2117 protruding outwards, and the reinforcing protrusion 2117 is connected to the liquid cooling plate 25.

In this embodiment, by providing the reinforcing protrusions 2117, the structural strength of the die-casting plate 211 at the bottom end opening of the runner 2112 can be improved, a sufficient opening position can be provided for the seal groove 2113, and the connection area between the die-casting plate 211 and the liquid cooling plate 25 can be increased.

Referring to fig. 7, the battery pack case may further include two water pipe fittings 27, and the two water pipe fittings 27 are installed at the outer sides of the side plates 21 and inserted into the corresponding flow passages 2112, respectively.

In this embodiment, two connector mounting holes may be integrally formed with the die-casting plate 211 on the outer side of the die-casting plate 211, the connector mounting holes are communicated with the corresponding flow passages 2112, and the water pipe connector 27 may be press-fitted into the corresponding connector mounting holes and sealed by interference fit. One water connection 27 is for external water inlet connection and the other water connection 27 is for external water outlet connection.

A battery pack according to another embodiment of the present utility model includes a battery pack case as described above.

The technical improvement and the technical effect of the battery pack are the same as those of the battery pack box body, so that the battery pack is not repeated.

An automobile according to still another embodiment of the present utility model includes a battery pack as described above.

Since the technical improvement and technical effect of the automobile are the same as those of the battery pack, the automobile will not be described in detail.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" and "a second" may explicitly or implicitly include at least one such feature.

Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. The utility model provides a battery package box, includes curb plate (21) and is used for as liquid cooling board (25) of battery package box bottom plate, curb plate (21) set up perpendicularly in the week side of liquid cooling board (25), a serial communication port, still include valve (28), the inside of curb plate (21) is provided with two runner (2112), two runner (2112) one port is located the lateral wall department of curb plate (21), two another port of runner (2112) respectively with the inside intercommunication of liquid cooling board (25), valve (28) install in curb plate (21) and at least part are located in one of them runner (2112).

2. The battery pack case according to claim 1, wherein the side plate (21) is provided with a cavity (2111) on an inner side wall thereof, and the valve (28) is mounted to a bottom of the cavity (2111) and is at least partially located in one of the flow passages (2112).

3. The battery pack case according to claim 2, further comprising a temperature sensor (29), the temperature sensor (29) being mounted to a bottom of the cavity (2111) and at least partially located in the other of the flow channels (2112).

4. The battery pack case according to claim 2, wherein the side plate (21) includes a side plate body (212) and a die-casting plate (211) that are connected, the side plate body (212) is provided with a mounting notch, the die-casting plate (211) is disposed at the mounting notch, and an inward side of the die-casting plate (211) has the cavity (2111).

5. The battery pack case according to claim 1, further comprising a seal ring (30), wherein a seal groove (2113) corresponding to the flow passage (2112) is provided at one end of the side plate (21) toward the liquid cooling plate (25), or a seal groove (2113) is provided at a position of the liquid cooling plate (25) corresponding to the flow passage (2112), and the seal ring (30) is provided in the seal groove (2113).

6. The battery pack case according to claim 5, wherein the side plate (21) is provided with a reinforcing protrusion (2117) protruding outward toward one end of the liquid cooling plate (25), and the reinforcing protrusion (2117) is connected to the liquid cooling plate (25).

7. The battery pack case according to claim 1, further comprising two water pipe fittings (27), the two water pipe fittings (27) being mounted on the outer sides of the side plates (21) and inserted into the corresponding flow passages (2112), respectively.

8. The battery pack case according to claim 1, wherein the valve (28) comprises a valve seat mounted to the side plate (21) and a shut-off piston (281), the shut-off piston (281) being movably connected to the valve seat, the shut-off piston (281) being adapted to be removed from the flow channel (2112) or at least partially inserted into the flow channel (2112).

9. A battery pack comprising the battery pack case according to any one of claims 1 to 8.

10. An automobile comprising the battery pack according to claim 9.