CN219979663U - Power battery module and electric vehicle with same - Google Patents

Abstract

The utility model discloses a power battery module and an electric vehicle with the same, wherein the power battery module comprises a battery cell assembly formed by a plurality of battery cell units which are stacked, the battery module also comprises a U-shaped side cooling plate attached to the outer side of the battery cell assembly, the side cooling plate is provided with an inner side surface which faces the battery cell unit, an outer side surface which is opposite to the inner side surface and a flow passage heat exchange part which is arranged between the inner side surface and the outer side surface, the number of adapters is reduced by utilizing the U-shaped side cooling plate, and the structural design of the side cooling plate is optimized while the problems of heat dissipation and leakage are solved.

Description

Power battery module and electric vehicle with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a power battery module and an electric vehicle with the same.

Background

The new energy vehicle is more and more appreciated by consumers because of more environmental protection, along with the continuous development of the new energy vehicle, people put forward higher requirements on the safety of the battery module, the main measure in the aspect of ensuring the safety of the battery module is that the working environment temperature of the battery core is controllable, in the aspect of heat dissipation of the battery core, the known technology is just solving the technical problems in this aspect, for example, a battery pack disclosed in China patent application No. CN115528376A published by 12 months 17 of 2022 is provided with a replacement hot plate between two adjacent battery monomers, then one end of the heat exchange plate is fixed on a side plate, the side plate plays a role in reinforcing the battery monomers, the heat dissipation effect of the side plate adopting an air cooling structure is limited by arranging a vent hole in the reinforcing position of the side plate;

in another example, in a battery module disclosed in chinese patent No. CN211980673U, which is issued in 11/20/2020, two side plates and a bottom plate are integrated into a U shape, and then two ends are sealed and fixed by using end plates to fix a plurality of battery cells in the battery module, two sides of the battery cells in the prior art are air-cooled, the bottom adopts water-cooled heat exchange, and the heat dissipation effect of the two sides is different from the heat dissipation effect of the bottom, which may cause uneven temperature inside the battery cells;

in the prior art, the case of adopting the water cooling plate as the side plate for cooling the battery cell is not spent, but in order to communicate the water paths inside the water cooling plates at two sides, a plurality of water connectors are needed, and the installation space of the water connectors, the reliability, the sealing performance, the part cost and the like of the connection mode are all increased, so that the design difficulty is not beneficial to the intensive design. In summary, in the field of power batteries, when a plurality of electric cores are placed in an overlapping manner, the heat dissipation problem is considered, the problem of firm and reliable assembly is considered, if the side cooling plates are simply adopted as the baffle plates, the cooling plates on two sides are required to be connected by adopting the adapter, so that the number of connecting pieces is increased undoubtedly, and meanwhile, the hidden quality trouble is increased, so that the prior art still has a room for improvement.

Disclosure of Invention

Aiming at the technical problems in the prior art, the utility model aims to provide the power battery module with good heat dissipation effect and more reliable structural design.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a power battery module, including the electric core subassembly that constitutes by a plurality of electric core units that stack the setting, battery module still includes the U-shaped side cooling board that attaches in the electric core subassembly outside, the side cooling board has the medial surface that sets up towards electric core unit, the opposite parallel arrangement's of medial surface lateral surface and the runner heat exchange portion of setting between medial surface and the lateral surface, be equipped with a plurality of U-shaped runners that are parallel to each other in the runner heat exchange portion.

Further, the power battery module further comprises end plates arranged at two ends of the battery cell assembly, and the inner side surfaces of the side cooling plates are fixedly connected with the end plates respectively.

Further, the side cooling plate comprises a mounting part which is integrally arranged with the runner heat exchange part, mounting holes are formed in positions of the mounting part corresponding to the two end plates, and the end plates are fixedly connected with the side cooling plate through the mounting holes.

Further, the installation part and the runner heat exchange part are provided with common inner side surfaces, and two sides of the battery cell unit are respectively attached to the inner side surfaces of the side cooling plates.

Further, the end plate is provided with a positioning column, and the side cooling plate is fixedly connected with the end plate in a mode of matching the positioning column with the mounting hole.

Further, the side cooling plate is integrated with a side plate water inlet 1 and a side plate water outlet at two ends respectively, and the two ends of the side cooling plate are bent and extended towards the middle direction of the end plate respectively.

Further, the side plate water inlet and the side plate water outlet are respectively arranged on two sides of the same end of the battery cell assembly or on the same side of the same end.

Further, the power battery module further comprises a partition plate arranged in the middle of the battery cell assembly, and the inner side surface of the side cooling plate is fixedly connected with the partition plate.

Further, heat-conducting glue is arranged between the inner side surface of the side cooling plate and the battery cell unit, and the inner side surface of the side cooling plate is fixed with the end plate through bonding or welding.

The utility model also aims to provide an electric vehicle adopting the power battery module.

By adopting the technical scheme, the utility model has the beneficial effects that:

the number of the connectors is reduced, the reliability of the power battery module is improved, the structural design of the power battery module is more reasonable, the layout is more compact and reliable, and an electric vehicle adopting the power battery module according to the utility model has a more reliable power system and longer service life.

Drawings

Fig. 1 is a schematic view of a first embodiment of a power battery module according to the present utility model;

fig. 2 is a schematic structural view of a second embodiment of a power battery module according to the present utility model;

fig. 3 is a schematic structural view of a third embodiment of a power battery module according to the present utility model;

FIG. 4 is a partially exploded schematic illustration of the power cell module configuration of FIG. 3;

FIG. 5 is another exploded view of the power cell module configuration of FIG. 3;

FIG. 6 is an enlarged partial schematic view of the area A shown in FIG. 5;

FIG. 7 is a schematic view in partial cross-section of the side cold plate of FIG. 2;

fig. 8 is a schematic structural view of a fourth embodiment of a power battery module provided by the present utility model;

fig. 9 is a schematic structural view of a further embodiment of a side cooling plate according to the present utility model.

In the figure:

200. a power battery module; 100. a power battery module; 10. a side cooling plate; 11. a side plate water inlet; 12. a side plate water outlet; 13. a heat dissipation gap; 101. a mounting hole; 110. a hollow seal head; 130. an inner side surface; 131. a side portion; 132. an outer side surface; 133. a bottom; 15. a mounting part; 16. a flow passage heat exchange part; 160. a flow passage; 161. reinforcing ribs; 20. A cell assembly; 21. a cell unit; 30. a bottom plate; 31. a bottom plate water inlet; 32. a water outlet of the bottom plate; 40. an end plate; 41. positioning columns; 42. a partition board.

Description of the embodiments

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1 to 5 and 8, embodiments of the present utility model provide a power battery module 100, where the power battery module 100 includes a battery cell assembly 20 formed by a plurality of stacked battery cell units 21, end plates 40 located at two ends of the battery cell assembly 20, and a side cooling plate 10 attached to a side surface of the battery cell assembly 20 for heat exchange, the side cooling plate 10 has a heat exchange function and also has a function of connecting and fixing the two end plates 40, specifically, the side cooling plate 10 and the end plates 40 are disposed around the periphery of the battery cell assembly 20, the side cooling plate 10 has a flow channel heat exchange portion 16 and an inner side surface 130 for supporting each battery cell unit 21 to keep the position of the battery cell unit 21, and an outer side surface 132 disposed relatively parallel to the inner side surface 130. Preferably, in various embodiments, the side cooling plate 10 is U-shaped, having two side portions 131 and a bottom portion 133 integrally formed, preferably made of aluminum or aluminum alloy, such side cooling plate 10 can significantly reduce the use of an adapter for interconnecting two side cooling plates 10, wherein two end plates 40 are respectively connected at the opening of the U-shaped side cooling plate 10 and near the bottom portion 133, and the two end plates 40 are parallel to each other. The electric core unit 21 is in a block-shaped and square structure, and is provided with a rectangular top surface, positive and negative electrodes (not numbered) are arranged on the top surface, the top surface of the electric core unit 21 is provided with a long side and a short side, the electric core unit 21 is stacked along one side where the long side is located, and the electric core unit 21 is attached to the side cooling plate 10 for heat exchange through one side where the short side is located, preferably, heat conducting glue is further arranged between the side surface of the electric core unit 21 and the side cooling plate 10, and the heat conducting glue can be made of silica gel or other colloid materials with good heat conducting capability, and besides the heat conducting effect, the colloid materials filled between the electric core unit 21 and the side cooling plate 10 can also play a role of buffer protection. In some embodiments, as shown in fig. 2, when the physical fixing strength requirement is not satisfied by using only two end plates 40 and the side cooling plates 10, a partition plate 42 having substantially the same shape as the end plates 40 may be further disposed at the middle position of the cell assembly 20, and the inner side of the side cooling plates 10 is fixedly connected with the partition plate 42.

In the schematic structural diagrams of the first embodiment and the second embodiment of the power battery module 100 shown in fig. 1 and fig. 2, the side cooling plate 10 is U-shaped and has a side plate water inlet 11 and a side plate water outlet 12 integrated into a whole, and the side plate water inlet 11 and the side plate water outlet 12 are respectively arranged at two sides of the same end of the battery cell assembly 20 and are opened along the vertical direction; as shown in the third embodiment of fig. 3, the side cooling plate 10 is U-shaped, the orientations of the side plate water inlet 11 and the side plate water outlet 12 are different from those of the first embodiment and the second embodiment, the side plate water inlet 11 and the side plate water outlet 12 are respectively integrated at two ends of the side cooling plate 10 by means of welding, integral molding, and the like, and the openings extend along the horizontal direction or at an inclined angle, but the side plate water inlet 11 and the side plate water outlet 12 are still respectively arranged at two sides of the same end of the battery cell assembly 20; as shown in fig. 8, in the fourth embodiment, the side cooling plate 10 is U-shaped in the vertical direction, the side plate water inlet 11 and the side plate water outlet 12 are located at the same side of the same end of the electric core assembly 20, and in another embodiment of the side cooling plate 10, as shown in fig. 9, the overall shape of the side cooling plate 10 is U-shaped in the vertical direction, the internal flow channel is divided into an upper flow channel and a lower flow channel, one end of the side cooling plate 10 adopts a hollow seal head 110 to communicate the upper flow channel with the lower flow channel, the side plate water inlet 11 and the side plate water outlet 12 are located at the same side of the same end of the electric core assembly 20, and the two embodiments can make the upper heat exchange effect of the electric core unit 21 different from the lower heat exchange effect through different bending angles, and further, the width of the upper flow channel can be set to be different from the width of the lower flow channel, so as to obtain the optimal heat management effect. In the above embodiments, the openings of the side plate water inlet 11 and the side plate water outlet 12 are preferably oriented in the same direction for maintenance and inspection, but may be configured as an upward opening and a downward opening, or extend obliquely to the required direction, preferably, the side plate water inlet 11 and the side plate water outlet 12 respectively extend to the inner side of the side plate 10, or both ends of the side plate water inlet 11 and the side plate water outlet 12 and the side plate water outlet 10 extend toward the middle of the battery module 20 by bending inwards, so that the interface of the side plate water inlet 11 and the side plate water outlet 12 does not exceed the outer side 132 of the side plate 10, in other words, both ends of the side plate water inlet 11 and the side plate water outlet 12 and/or the side plate water outlet 10 are bent toward the middle of the end plate 40, which is designed to place the two power battery modules 100 close together, so as to avoid occupying the space between the power battery modules 100 due to the orientation and size problems of the connector. In addition, the number of the side cooling plates 10 may be single or multiple, and the width of the side cooling plates 10 may be designed according to the height of the battery cell assembly 20, that is, the specific width and number of the side cooling plates 10 are not limited by the drawings of the present utility model.

As shown in fig. 1 and 8, in the first embodiment and the fourth embodiment, the side cooling plate 10 is adhered and fixed to the end plate 40 by an adhesive material, and the adhesive material may be a structural adhesive; in other embodiments, the side cooling plate 10 may be fixed to the end plate 40 by other auxiliary means, such as welding, or by providing a buckle, a slot, or even binding on the end plate 40, so as to achieve structural connection with the side cooling plate 10.

As shown in fig. 2 to 7, in the second and third embodiments, in order to achieve the connection fixing function, the side cooling plate 10 according to the present utility model is provided with the mounting portion 15 integrally formed with the flow path heat exchanging portion 16, and the mounting portion 15 is provided with the mounting holes 101 at positions corresponding to the two end plates 40, respectively, and the end plates 40 are fixedly connected to the mounting holes 101. In the second embodiment, as shown in fig. 2 and 7, the side cooling plate 10 includes a flow channel heat exchange portion 16 and a mounting portion 15 located in the middle of the flow channel heat exchange portion 16, and the mounting hole 101 is disposed on the mounting portion 15 at a position corresponding to the end plate 40; in the third embodiment, as shown in fig. 3 to 6, the side cooling plate 10 includes a flow path heat exchanging portion 16 and mounting portions 15 disposed on both sides of the flow path heat exchanging portion 16, and the mounting holes 101 are disposed on the mounting portions 15 at positions corresponding to the end plates 40. In the above two embodiments, the end plate 40 is provided with the positioning column 41, and the side cooling plate 10 is fixedly connected with the end plate 40 by means of the positioning column 41 and the mounting hole 101 in a matching manner, preferably, the diameter of the positioning column 41 is not smaller than the inner diameter of the mounting hole 101, that is, the positioning column 41 and the mounting hole 101 are fixed in an interference fit manner. In other embodiments, the end plate 40 may be further connected and fixed by a screw penetrating through the mounting hole 101, and in this embodiment, the positioning post 41 and the mounting hole 101 are in interference fit, and may be connected and fixed by riveting means, or the positioning post 41 and the mounting hole 101 are integrally connected by spot welding, laser welding, or the like. Preferably, the thickness of the mounting portion 15 is not greater than the thickness of the flow passage heat exchange portion 16, and the top portion of the positioning post 41 after penetrating the mounting hole 101 does not protrude beyond the surface of the flow passage heat exchange portion 16, so that a preferable appearance can be obtained even without affecting the approaching of the two power battery modules 100. Further, in other embodiments, the positioning column 41 and the mounting hole 101 may be matched to achieve the pre-positioning, and then the end plate 40 is further welded or bonded to the side cooling plate 10 into a whole, so that the step of using an external jig to perform the auxiliary positioning during the welding or bonding can be omitted.

Through fixing the side cooling plate 10 of U-shaped on two end plates 40, form a rectangle inner chamber for retraining a plurality of electric core units 21 that pile up the setting, saved the step of adopting extra curb plate to fix like this, still realized the connection of electric core subassembly 20 on the horizontal direction fixed when realizing the heat transfer effect, only need select the thickness of the side cooling plate 10 that accords with the intensity requirement and its installation department 15 according to actual demand, can realize the purpose that is used for mechanical connection with side cooling plate 10, still realized the thermal management of electric core subassembly 20 when obtaining reliable, compact structure.

As shown in fig. 6 and 7, in order to increase the strength of the side cooling plate 10, a plurality of reinforcing ribs 161 are provided in the flow passage heat exchange portion 16 of the side cooling plate 10, and the reinforcing ribs 161 divide the interior of the flow passage heat exchange portion 16 into a plurality of parallel U-shaped flow passages 160. Due to the existence of the reinforcing ribs, the stress intensity of the side cooling plate 10 is improved, so that the side cooling plate is not easy to deform. The side cooling plate 10 is provided with a side plate water inlet 11 and a side plate water outlet 12, two ends of a flow passage 160 are respectively communicated with the side plate water inlet 11 and the side plate water outlet 12, a refrigerant medium enters the side cooling plate 10 from the side plate water inlet 11, and exchanges heat with each electric core unit 21 through a flow passage heat exchange part 16 of the side cooling plate 10, so that heat of the electric core units 21 is taken away, and the temperature of the electric core assembly 20 is controlled within an expected range in a continuous cooling mode. Preferably, the side plate water inlet 11 and the side plate water outlet 12 face to the same side of the cell assembly 20, so that the operation is more convenient when the pipeline is installed from the outside, and the later maintenance and inspection are also more convenient.

As shown in fig. 3, the power battery module 100 further includes a bottom plate 30 disposed at the bottom of the battery cell assembly 20 for carrying the battery cell assembly 20, where the bottom plate 30 also has heat exchange effect in this embodiment, and in order to achieve this purpose, the bottom plate 30 is provided with an internal flow path channel (not shown), and a bottom plate water inlet 31 and a bottom plate water outlet 32 that are in communication with the internal flow path channel. The side plate water inlet 11, the side plate water outlet 12, the bottom plate water inlet 31 and the bottom plate water outlet 32 are positioned at the same end of the cell assembly 20. In one embodiment, the side plate water inlet 11 and the bottom plate water inlet 31 are positioned at one side of the end plate 40 and are finally communicated with each other through a pipeline, while the side plate water outlet 12 and the bottom plate water outlet 32 are positioned at the other side of the end plate 40 and are also finally communicated with each other through an external pipeline, so that the side cold plate 10 and the bottom plate 30 can be synchronously supplied with the refrigerant medium. It should be apparent that, in other embodiments, when the battery cell 21 in the battery cell assembly 20 needs to be heated instead of radiating heat, a medium having a temperature higher than the surface temperature of the battery cell 21 may be injected into the side plate water inlet 11, and the flow direction of the medium does not need to enter from the side plate water inlet 11, and may also perform a heat exchange function when the fluid enters from the side plate water outlet 12 and exits from the side plate water inlet 11, for example, which is not described herein.

It should be noted that, in the case of performing thermal management on the battery cell assembly 20, it is not necessary to consider that the larger the heat exchange area is, for example, the different amounts of heat dissipation need to be performed between the battery cell 21 located at the boundary and the battery cell 21 located inside, and the different amounts of heat generated by the side edges, the side surfaces and the bottom surface of the same battery cell 21 are also required, so that, in terms of the thermal management manner of the power battery module 100 and the power battery module 200, only the uniformity of the temperature of the controlled battery cell 21 is ensured, that is, the situation that the local heat dissipation is good and the local temperature is high should be avoided. In view of this, the two ends of the battery core assembly 20 according to the present utility model are both provided with the end plates 40, so that the direct heat exchange between the side of the larger area of the battery core unit 21 and the side cooling plate 10 can be avoided, that is, the heat exchange between the battery core unit 21 located at the two ends of the battery core assembly 20 and the battery core unit 21 located in the middle of the battery core assembly 20 is performed with the same contact area and the side cooling plate 10, so that the heat dissipation effect of each battery core unit 21 is the same, and the uniformity of temperature control is achieved, and on the other hand, preferably, the heat dissipation gap 13 is provided between the bottom plate 30 and the side cooling plate 10, so that the heat exchange between the two heat exchange plates at the junction of the bottom and the side of the battery core unit 21 can be avoided, and the temperature in the region is too low for a long time relative to other positions, so that the internal temperature of the single battery core unit 21 is uneven, and the service life of the battery is reduced.

The utility model also discloses an electric vehicle using the power battery module 100, and the electric vehicle conforming to the utility model has a more reliable power system and longer service life by adopting the power battery module 100.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a power battery module (100), includes electric core subassembly (20) that constitute by electric core unit (21) of a plurality of stacks setting, its characterized in that, battery module (100) still is including attaching U-shaped side cold plate (10) that locates electric core subassembly (20) outside, side cold plate (10) have medial surface (130) towards electric core unit (21) setting, with medial surface (130) relative parallel arrangement's lateral surface (132) and set up runner heat exchange part (16) between medial surface (130) and lateral surface (132), be equipped with a plurality of U-shaped runners (160) that are parallel to each other in runner heat exchange part (16).

2. The power cell module (100) of claim 1, wherein: the battery cell module further comprises end plates (40) arranged at two ends of the battery cell assembly (20), and the inner side surfaces of the side cooling plates (10) are fixedly connected with the end plates (40) respectively.

3. The power cell module (100) of claim 2, wherein: the side cooling plate (10) comprises a mounting part (15) which is integrally arranged with the runner heat exchange part (16), mounting holes (101) are formed in the positions, corresponding to the two end plates (40), of the mounting part (15), and the end plates (40) are fixedly connected with the side cooling plate (10) through the mounting holes (101).

4. A power cell module (100) according to claim 3, characterized in that: the mounting part (15) and the runner heat exchange part (16) have a common inner side surface (130), and two sides of the battery cell unit (21) are respectively attached to the inner side surface (130) of the side cooling plate (10).

5. A power cell module (100) according to claim 3, characterized in that: the end plate (40) is provided with a positioning column (41), and the side cooling plate (10) is fixedly connected with the end plate (40) in a mode of matching the positioning column (41) with the mounting hole (101).

6. The power battery module (100) according to any one of claims 1 to 5, wherein: the side cooling plates (10) are respectively integrated with a side plate water inlet (11) and a side plate water outlet (12) at two ends, and the two ends of each side cooling plate (10) are respectively bent and extended towards the middle direction of the end plate (40).

7. The power cell module (100) of claim 6, wherein: the side plate water inlet (11) and the side plate water outlet (12) are respectively arranged on two sides of the same end or the same side of the same end of the battery cell assembly (20).

8. The power cell module (100) of claim 2, wherein: the battery cell assembly further comprises a partition plate (42) arranged in the middle of the battery cell assembly (20), and the inner side surface of the side cooling plate (10) is fixedly connected with the partition plate (42).

9. The power cell module (100) of claim 2, wherein: the heat-conducting glue is arranged between the inner side surface (130) of the side cooling plate (10) and the battery cell unit (21), and the inner side surface (130) of the side cooling plate (10) and the end plate (40) are fixed through bonding or welding.

10. An electric vehicle characterized by comprising a power battery module (100) according to any one of claims 1-9.