CN217468574U - Battery module, battery pack and power device - Google Patents

Abstract

The utility model discloses a battery module, battery package and power device, the battery module includes: the battery comprises battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are orderly stacked along a first direction, and a first surface and a second surface are arranged at two ends of each battery cell along the first direction; a cooling unit disposed on the first and/or second surface of the cell, the cooling unit comprising: a first housing; the buffering frame is arranged on one side of the first shell and is provided with a first opening and a second opening; the second shell is arranged on one side, far away from the first shell, of the buffering frame, and the first shell, the buffering frame and the second shell are sealed to form a cooling space. From this, this battery module heat dissipation is fast, and is thermal-insulated effectual between the electric core, can effectively prevent the emergence that the heat stretchs, improves the security of battery package, and simultaneously, the cooling unit can satisfy electric core circulation inflation's demand space.

Description

Battery module, battery pack and power device

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery module, battery package and power device are related to.

Background

With the rapid development of the electric automobile industry, the low-temperature charging speed and the low-temperature endurance are gradually significant factors for restricting the further development of the electric automobile in the north. The high multiplying power fills the limiting factor that battery system temperature rise soon excessively becomes further improvement battery system charge efficiency, electric core intensifies the hot runaway that takes place easily at the excessive speed, and then lead to thermal diffusion explosion on fire, cause the safety problem, especially to the battery of top play utmost point post, utmost point post position heat production is many and whole radiating effect is not good, and, the water-cooling board of present battery module can't dispel the heat to the electric core big face, need extra thermal-insulated buffer material in order to satisfy the space demand of circulation inflation between the battery and prevent the demand of thermal diffusion between the electric core, even so, also hardly avoid the emergence of thermal extension, consequently, present battery module still needs further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a battery module, a battery pack and a power device. This battery module heat dissipation is fast, and thermal-insulated effectual between the electric core can prevent effectively that the emergence of heat from stretching, improves the security of battery package, and simultaneously, the cooling unit can satisfy electric core circulation inflation's demand space.

In one aspect of the present invention, a battery module is provided, which includes a plurality of battery cells stacked in order along a first direction, and a first surface and a second surface are disposed at two ends of each battery cell along the first direction;

a cooling unit disposed on the first and/or second surface of the cell, the cooling unit comprising:

a first housing;

the buffering frame is arranged on one side of the first shell and is provided with a first opening and a second opening;

the second shell is arranged on one side, far away from the first shell, of the buffering frame, and the first shell, the buffering frame and the second shell are sealed to form a cooling space.

The utility model relates to a battery module, cooling unit set up on the big face of electric core, can improve the radiating effect and the radiating efficiency to the electric core to solve the heat dissipation demand of big multiplying power quick charging system, when electric core takes place the thermal runaway, the heat of thermal runaway electric core can be taken away fast to high-efficient heat-sinking capability, realize the thermal isolation between thermal runaway electric core and adjacent electric core, prevent the emergence of thermal spread, improve the security of battery package; the frame of cooling unit is the buffering frame, makes cooling unit can dispel the heat to electric core big face, can play the function of buffering again, and when electric core thermal runaway took place to deform, the cooling space can satisfy the demand of electric core to the space, prevents that thermal runaway electric core from causing the damage to other electric cores.

According to some embodiments of the utility model, the buffering frame includes consecutive first frame, second frame, third frame and fourth frame, first frame with the third frame sets up first casing is along the both ends of second direction, the second frame with the fourth frame sets up first casing is along the both ends of third direction, first opening sets up on the first frame, the second opening sets up on the third frame.

According to some embodiments of the invention, the cooling unit further comprises a buffer unit disposed in the cooling space.

According to some embodiments of the present invention, the buffer unit includes a plurality of buffer strips, the plurality of buffer strips are equidistantly arranged along the third direction, the buffer strips extend along the second direction, and both ends of the buffer strips form a gap with the buffer frame; the distance between two adjacent buffer strips is a, and a is less than or equal to 20 mm.

According to some embodiments of the invention, the width of the cushioning strip is not less than the thickness of the cushioning strip.

According to the utility model discloses a some embodiments, form the buffering strip with the material of buffering frame is rubber, the compression ratio of rubber is m, and satisfies that m ≦ (d 0.15)/c, wherein, c is the thickness of buffering strip, d is the thickness of electricity core.

According to some embodiments of the present invention, the cooling unit satisfies L1 xa 1 ═ L2 xa 2, wherein L1 is a design stress of the first housing and the second housing, a1 is an area of the first surface or the second surface, L2 is a design stress of the buffer strip, and a2 is an area of a surface of the buffer strip in contact with the first housing or the second housing.

In another aspect of the present invention, a battery pack is provided, which includes the aforementioned battery module. Therefore, the battery pack has all the characteristics and advantages of the battery module, and the description is omitted here. Generally, the heat dissipation device has the advantages of at least fast heat dissipation, high safety and long service life.

In another aspect of the present invention, a power device is provided, which includes the aforementioned battery pack. Therefore, the power device has all the characteristics and advantages of the battery pack, and the power device has the advantages of fast heat dissipation and high safety.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a viewing angle of a battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a battery cell according to an embodiment of the present invention;

fig. 3 is a schematic view of another perspective of a cooling unit according to an embodiment of the present invention;

fig. 4 is a schematic diagram of another perspective view of a cooling unit according to an embodiment of the present invention.

Reference numerals:

1000: a battery module; 1100: an electric core; 1110: a first surface; 1120: a second surface; 1200: a cooling unit; 1210: a first housing; 1220: buffering the frame; 1221: a first frame; 1222: a second frame; 1223: a third frame; 1224: a fourth frame; 1225: a first opening; 1226: a second opening; 1230: a second housing; 1240: a buffer unit; 1241: a buffer strip; 1250: an end plate; 1260: a pipeline.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

A battery module 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

In one aspect of the present invention, referring to fig. 1, a battery module 1000 is provided, which includes a battery cell 1100 and a cooling unit 1200, wherein,

a plurality of battery cells 1100 are sequentially stacked in a first direction, and both ends of the battery cells 1100 in the first direction are provided with a first surface 1110 and a second surface (not shown in the figure), that is, a large surface of the battery cell 1100 (refer to fig. 2);

the cooling units 1200 are disposed on the first surface 1110 and/or the second surface of the battery cells 1100, that is, the cooling units 1200 may be disposed on only one large surface of the battery cells 1100, and when the battery cells 1100 are sequentially stacked in the first direction, one cooling unit 1200 is disposed between two adjacent battery cells 1100 to dissipate heat of the battery cells 1100 (refer to fig. 1); when the two large surfaces of the battery cells 1100 are both provided with the cooling units 1200, after the battery cells 1100 are stacked in order along the first direction, two cooling units 1200 are disposed between two adjacent battery cells 1100 to dissipate heat of the battery cells 1100 (not shown in the figure).

Specifically, referring to fig. 3 and 4, the cooling unit 1200 includes: a first case 1210, a buffer bezel 1220, and a second case 1230;

the buffer bezel 1220 is disposed at one side of the first case 1210, and the buffer bezel 1220 is provided with a first opening 1225 and a second opening 1226;

the second case 1230 is disposed on a side of the buffer bezel 1220 away from the first case 1210, and the first case 1210, the buffer bezel 1220, and the second case 1230 are sealed to form a cooling space.

The utility model relates to a battery module 1000, cooling unit 1200 sets up on the big face of electric core 1100, can improve the radiating effect and the radiating efficiency to electric core 1100 to solve the heat dissipation demand of big multiplying power quick charging system, when electric core 1100 takes place the thermal runaway, the heat of thermal runaway electric core 1100 can be taken away fast to high-efficient heat-sinking capability, realize the thermal isolation between thermal runaway electric core 1100 and adjacent electric core 1100, prevent the emergence of thermal spread, improve the security of battery package; the frame of the cooling unit 1200 is a buffering frame 1220, so that the cooling unit 1200 can not only dissipate heat of the large surface of the battery cell 1100, but also play a role in buffering; when the battery cell 1100 is out of thermal control and deforms, the cooling space can meet the requirement of the battery cell 1100 for the space, and the battery cell 1100 out of thermal control is prevented from damaging other battery cells 1100.

According to some embodiments of the present invention, the battery module 1000 may also be provided with end plates 1250 along the two ends of the first direction to fix the battery cell 1100.

According to some embodiments of the present invention, the connection manner of the buffering frame 1220 and the first and second housings 1210 and 1230 is not particularly limited, and for example, the buffering frame 1220 and the first and second housings 1230 may be hermetically connected by gluing, hot melting, or embedding.

According to some embodiments of the present invention, referring to fig. 4, the structure of the buffering frame 1220 is not particularly limited, and one skilled in the art may design the cooling unit 1200 according to the requirement of the battery module 1000 for heat dissipation capability, in order to increase the volume of the cooling space, the buffering frame 1220 may include a first frame 1221, a second frame 1222, a third frame 1223 and a fourth frame 1224 connected in sequence, the first frame 1221 and the third frame 1223 are disposed at both ends of the first case 1210 along the second direction, the second frame 1222 and the fourth frame 1224 are disposed at both ends of the first case 1210 along the third direction, the first opening 1225 is disposed on the first frame 1221, and the second opening 1226 is disposed on the third frame 1223. Therefore, the buffering frame 1220 is arranged at the edge positions of the first shell body 1210 and the second shell body 1230, the cooling space formed after the buffering frame 1220, the first shell body 1210 and the second shell body 1230 are sealed is large, the heat dissipation and heat insulation effects on the battery cell 1100 are better, the battery cell 1100 can be better deformed, the buffering space is provided for the deformation of the battery cell 1100, and the battery cell 1100 which is deformed due to thermal runaway is prevented from damaging other battery cells 1100. Meanwhile, when the battery cell 1100 is out of thermal runaway, after the high-voltage control Board (BMS) detects the thermal runaway, the thermal management water circulation is quickly started, the cooling liquid can be introduced into the cooling space through the first opening 1225, and the cooling liquid absorbing heat can flow out of the cooling space through the second opening 1226, so that the heat of the battery cell 1100 is taken away, and the thermal isolation between the thermal runaway battery cell 1100 and the adjacent battery cell 1100 is realized. According to some embodiments of the present invention, a plastic or metal pipeline 1260 may be disposed at the first opening 1225 and the second opening 1226, and the pipeline 1260 is connected to the coolant channel, so as to introduce the coolant into the cooling space through the pipeline 1260, or to discharge the coolant along the pipeline 1260.

According to some embodiments of the present invention, referring to fig. 3 and 4, the cooling unit 1200 may further include a buffer unit 1240, and the buffer unit 1240 is disposed in the cooling space. Accordingly, the buffer unit 1240 can further improve the buffer function of the battery module 1000, and the buffer unit 1240 provided in the cooling space can further improve the heat insulation effect of the battery module 1000 and prevent the occurrence of heat spreading.

According to some embodiments of the present invention, referring to fig. 3 and 4, the buffering unit 1240 includes a plurality of buffering strips 1241, the plurality of buffering strips 1241 are arranged along the third direction at equal intervals, the buffering strips 1241 extend along the second direction, and both ends of the buffering strips 1241 form a gap with the buffering frame 1220. From this, the coolant liquid can form many circulating routes in the cooling space, further improves the heat absorption radiating effect to electric core 1100, and a plurality of buffering strips 1241 equidistance are arranged, can improve the samming effect to the big face even heat dissipation of electric core 1100. According to some embodiments of the present invention, the distance between two adjacent buffering strips 1241 is a, and satisfies a ≦ 20 mm. Therefore, the gap between two adjacent buffer strips 1241 is prevented from being too large, and when the battery core 1100 is extruded, the cooling liquid circulation pipeline is compressed and deformed, and the channel function is lost.

According to some embodiments of the present invention, the connection manner of the buffering strip 1241 and the first and second housings 1210 and 1230 is not particularly limited, and for example, the buffering strip 1241 may be fixedly connected by gluing, hot melting, or embedding.

According to some embodiments of the present invention, the width of the bumper bar 1241 is not less than the thickness of the bumper bar 1241. Thus, when the battery cell 1100 is compressed, the bumper bar 1241 is prevented from being excessively thick to cause relative displacement between the first case 1210 and the second case 1230.

According to some embodiments of the present invention, the material forming the buffering strip 1241 and the buffering frame 1220 may be rubber, the compression ratio of rubber is m, and satisfies that m is less than or equal to (d × 0.15)/c, wherein c is the thickness of the buffering strip, and d is the thickness of the electric core 1100. From this, when electric core 1100 takes place deformation, guarantee that cooling unit 1200's buffering compressive strain ability satisfies electric core 1100's deformation demand, if cooling unit 1200's buffering compressive strain ability is too little, when electric core 1100 takes place deformation, can harm other electric core 1100.

According to some embodiments of the present invention, the cooling unit 1200 satisfies L1 × a1 ═ L2 × a2, wherein L1 is the design stress of the first case 1210 and the second case 1230, a1 is the area of the first surface 1110 or the second surface, L2 is the design stress of the bumper bar 1241, and a2 is the area of the surface of the bumper bar 1241 in contact with the first case 1210 or the second case 1230. From this, when electric core 1100 takes place deformation, guarantee that cooling unit 1200's buffering compressive strain ability satisfies electric core 1100's deformation demand, if cooling unit 1200's buffering compressive strain ability is too little, when electric core 1100 takes place deformation, can harm other electric core 1100.

According to some embodiments of the invention 0.01. ltoreq.A 2/A1. ltoreq.1. If the area proportion of the buffer material is too small, the buffer performance is insufficient; if the area ratio of the buffer material is too large, the cooling fluid in the cooling space has less flowing space and the volume of the cooling fluid that can flow through the cooling space is small, which may reduce the heat dissipation effect of the cooling unit 1200.

In another aspect of the present invention, a battery pack is provided, which includes the battery module 1000. Therefore, the battery pack has all the features and advantages of the battery module 1000, and will not be described herein again. Generally, the heat dissipation device has the advantages of at least fast heat dissipation, high safety and long service life.

In another aspect of the present invention, a power device is provided, which includes the aforementioned battery pack. Therefore, the power device has all the characteristics and advantages of the battery pack, and the power device has the advantages of fast heat dissipation and high safety.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery module, comprising:

the battery comprises battery cells, a plurality of battery cells and a plurality of battery cells, wherein the battery cells are orderly stacked along a first direction, and a first surface and a second surface are arranged at two ends of each battery cell along the first direction;

a cooling unit disposed on the first and/or second surface of the cell, the cooling unit comprising:

a first housing;

the buffering frame is arranged on one side of the first shell and is provided with a first opening and a second opening;

the second shell is arranged on one side, far away from the first shell, of the buffering frame, and the first shell, the buffering frame and the second shell are sealed to form a cooling space.

2. The battery module according to claim 1, wherein the buffer frame comprises a first frame, a second frame, a third frame and a fourth frame, which are connected in sequence, the first frame and the third frame are disposed at two ends of the first housing along the second direction, the second frame and the fourth frame are disposed at two ends of the first housing along the third direction, the first opening is disposed on the first frame, and the second opening is disposed on the third frame.

3. The battery module according to claim 2, wherein the cooling unit further comprises a buffer unit disposed in the cooling space.

4. The battery module according to claim 3, wherein the buffer unit comprises a plurality of buffer strips, the plurality of buffer strips are arranged at equal intervals along the third direction, the buffer strips extend along the second direction, and two ends of each buffer strip form a gap with the buffer frame;

the distance between two adjacent buffer strips is a, and a is less than or equal to 20 mm.

5. The battery module according to claim 4, wherein the width of the buffer bar is not less than the thickness of the buffer bar.

6. The battery module according to claim 5, wherein the material forming the buffer strip and the buffer frame is rubber, the compression ratio of the rubber is m, and m ≦ (d x 0.15)/c is satisfied, wherein c is the thickness of the buffer strip, and d is the thickness of the battery core.

7. The battery module according to claim 6, wherein the cooling unit satisfies L1 xA 1 ═ L2 xA 2, wherein L1 is a design stress of the first case and the second case, A1 is an area of the first surface or the second surface, L2 is a design stress of the buffer bar, and A2 is an area of a surface of the buffer bar contacting the first case or the second case.

8. The battery module according to claim 7, wherein 0.01. ltoreq. A2/A1. ltoreq.1.

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

10. A power plant comprising the battery pack of claim 9.

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