CN219163549U - battery pack - Google Patents

Abstract

The utility model discloses a battery pack, which comprises a tray and electric cores. The tray includes a bottom plate and several ribs, and the several ribs are arranged at intervals on the top of the bottom plate; several electric cores are arrayed along the length and width of the tray. Distributed in the tray; the bottom of the battery core is provided with a pole and an explosion-proof valve, and the bottom of the battery core is against multiple ribs, so that the pole is located between two adjacent ribs, and the bottom of the battery core, the bottom plate An exhaust channel is enclosed between two adjacent raised ribs, and the explosion-proof valve faces and communicates with the exhaust channel. In the battery pack of the present utility model, the bottom of the cell is placed against a plurality of convex ribs, and the pole of the cell and the explosion-proof valve are arranged downward, so that the pole is located between two adjacent ribs, thereby It can save space in the Z direction; at the same time, the bottom of the tray is connected to the explosion-proof valve through the exhaust channel, and the high-temperature gas can be discharged outward through the exhaust channel, thereby greatly improving the safety of the battery pack after thermal runaway.

Description

battery pack

technical field

The utility model relates to the field of batteries, in particular to a battery pack.

Background technique

In recent years, the emergence of new energy vehicles has played a huge role in promoting social development and environmental protection. The power battery pack is a rechargeable battery that is the power source of new energy vehicles and is widely used in the field of new energy vehicles.

In the existing battery pack, the positive and negative poles of the battery cell are arranged upwards. After the thermal runaway of the battery cell, the high-temperature gas is discharged to the upper cover of the battery pack, which directly causes the temperature at the bottom of the cockpit of the vehicle to rise; At the same time, the pole of the battery cell is facing upwards, which makes the space utilization rate of the car chassis low.

Utility model content

The technical problem to be solved by the utility model is to overcome the disadvantages in the prior art that the positive and negative poles of the electric core are all arranged upwards, which causes the temperature at the bottom of the cockpit of the whole vehicle to rise, and the space utilization rate of the automobile chassis is low. A battery pack.

The utility model solves the problems of the technologies described above through the following technical solutions:

A battery pack comprising:

A tray, the tray includes a bottom plate and several ribs, and several ribs are arranged at intervals on the top of the bottom plate;

battery cells, several of the battery cells are arranged in arrays in the tray along the length and width directions of the tray;

The bottom of the battery core is provided with a pole and an explosion-proof valve, and the bottom of the battery core is against a plurality of the ribs, so that the pole is located between two adjacent ribs, and the An exhaust channel is enclosed between the bottom of the battery cell, the bottom plate and two adjacent ribs, and the explosion-proof valve faces and communicates with the exhaust channel.

In this solution, the above-mentioned structure is adopted, and the poles and explosion-proof valves of several batteries are set downwards, and the bottoms of the batteries are pressed against multiple ribs, so that the poles face down and are located in the same position. Between the adjacent two convex ribs, the space in the Z direction can be saved, and the space utilization rate of the chassis of the car can be higher. At the same time, the bottom of the tray is connected to the explosion-proof valve through the exhaust channel. After the thermal runaway of the battery cell, the high-temperature gas can be discharged through the exhaust channel without directly increasing the temperature of the bottom of the car cockpit, thereby greatly improving the performance of the battery pack. Safety after thermal runaway.

Preferably, a pole area is enclosed between the bottom of the cell, the bottom plate, and two adjacent ribs, and the pole area and the exhaust channel pass through the ribs Separated, the poles are located in the pole area.

In this solution, the above-mentioned structural form is adopted, and the bottom of the cell is pressed against multiple ribs to form a pole area and an exhaust channel. The pole area is used to accommodate the pole to save space in the Z direction. The gas channel is used to discharge high temperature gas to improve the safety of the battery pack. At the same time, the pole area and the exhaust channel are separated by ribs, so that the high-temperature gas in the exhaust channel will not flow into the pole area, further improving the safety of the battery pack.

Preferably, the battery pack further includes an insulating support, the insulating support is arranged between the tray and the plurality of batteries, and the insulating support extends into the pole area, There is a gap between the pole and the tray.

In this solution, the above-mentioned structural form is adopted, and the insulating support has a good insulating effect. The insulating support is arranged between the tray and the battery core, so that there is a gap between the pole and the tray without contact, which greatly improves Battery pack safety.

Preferably, the insulating support has a plurality of through holes, and the battery pack further includes a plurality of pole connecting pieces, the poles protrude into the through holes, and the two ends of the pole connecting pieces respectively extend into the two through holes and connect with the pole posts in the two through holes.

In this solution, it is more convenient to use the pole connecting piece to realize the connection of the battery cells by adopting the above structure. At the same time, the pole connecting piece is inserted into the through hole, so that the pole connecting piece is connected with the pole and has a gap with the tray, thereby improving the safety of the battery pack. And it can be installed by opening a through hole on the insulating supporting member, the structure is simple, and the processing is convenient.

Preferably, the pole connecting piece is made of aluminum; and/or, the pole connecting piece is welded to the pole.

In this solution, the above-mentioned structural form is adopted, which has good electrical conductivity and low cost. At the same time, the connection strength between the connecting piece of the pole and the pole is high, further improving the safety and stability of the battery pack.

Preferably, the bottom of the insulating support member facing the bottom plate has at least one step portion, and the step portion fits against the rib and/or the bottom plate.

In this solution, the above-mentioned structural form is adopted, and the insulating support is made to abut against the tray through the step portion, so that the installation and connection are very convenient; and it is ensured that there is a gap between the pole connection piece located in the through hole and the tray, and the safety and stability are better. high.

Preferably, the insulating support is bonded to the tray; and/or, the electric core is bonded to the insulating support.

In this solution, the above-mentioned structural form is adopted and connected by bonding. The installation and connection are very convenient, and the connection strength is further strengthened, which effectively avoids the phenomenon of offset and dislocation during use, and greatly improves the safety of the battery pack. stability.

Preferably, the battery pack further includes several liquid cooling plates, the liquid cooling plates have cooling channels inside, and the several liquid cooling plates and the several electric cells are along the length of the tray and/or The width direction is cross-stacked and arranged in the tray, so that any one of the battery cells has the liquid cooling plate on both sides.

In this solution, the above-mentioned structural form is adopted, and the two sides of the battery cell are provided with liquid cooling plates, so that the two sides of the battery cell will correspond to the cooling channels of the liquid cooling plate, so that the high temperature generated by the battery cell will be in contact with the cooling flow. The coolant in the channel conducts heat exchange, thereby reducing the temperature of the battery cell, effectively preventing the temperature of the battery cell from being too high, improving the temperature uniformity of the battery pack, and greatly improving the safety and service life of the battery pack.

Preferably, several ribs are integrally formed with the bottom plate.

In this solution, the above-mentioned structural form is adopted, which is manufactured by integral molding, which is convenient to process and manufacture, and the strength of the connection structure is high, which greatly improves the stability of the pallet.

Preferably, there is a weight-reducing cavity inside the bottom plate and/or the rib.

In this solution, by adopting the above-mentioned structural form, the overall weight of the tray can be effectively reduced through the weight-reducing cavity, and the cost of the battery pack can be reduced.

On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain the preferred examples of the present utility model.

The positive progressive effect of the present utility model is:

In the battery pack of the utility model, the bottom of the battery cell is placed against a plurality of convex ribs, and the pole column and the explosion-proof valve of the battery cell are arranged downward, so that the pole column is located between two adjacent convex ribs, thereby It can save space in the Z direction; at the same time, the bottom of the tray is connected to the explosion-proof valve through the exhaust channel, and the high-temperature gas can be discharged outward through the exhaust channel, thereby greatly improving the safety of the battery pack after thermal runaway.

Description of drawings

FIG. 1 is a schematic diagram of a three-dimensional structure of a battery pack according to an embodiment of the present invention.

FIG. 2 is a schematic top view of the battery pack according to the embodiment of the present invention, in which the liquid cooling plate is omitted.

Fig. 3 is a schematic cross-sectional structure diagram along line A-A of Fig. 2 .

Fig. 4 is a schematic structural diagram of the tray of the embodiment of the present invention.

FIG. 5 is a schematic cross-sectional structure diagram along line B-B of FIG. 4 .

Fig. 6 is a partial structural schematic diagram of a battery pack according to an embodiment of the present invention, in which the tray and the liquid cooling plate are omitted.

FIG. 7 is a partially enlarged view of part C in FIG. 6 .

Fig. 8 is a schematic diagram of the exploded structure of the battery cell and the liquid cooling plate of the embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a liquid cooling plate according to an embodiment of the present invention.

Explanation of reference signs:

Cell 1

Pole 11

Explosion-proof valve 12

Tray 2

Bottom plate 21

Rib 22

pole area 23

Exhaust channel 24

Lightening cavity 25

Insulation support 3

Via 31

step part 32

Pole connecting piece 4

Liquid cold plate 5

Detailed ways

The utility model will be more clearly and completely described below by means of embodiments in conjunction with the accompanying drawings, but the utility model is not limited to the scope of the embodiments.

As shown in FIG. 1 to FIG. 9 , the embodiment of the utility model discloses a battery pack, and the battery pack is installed on an automobile chassis. The battery pack includes battery cells 1 and a tray 2. The tray 2 includes a bottom plate 21 and several ribs 22. Several ribs 22 are arranged at intervals on the top of the bottom plate 21; several battery cells 1 are arrayed along the length and width of the tray 2. Distributed in the tray 2; the bottom of the cell 1 is provided with a pole 11 and an explosion-proof valve 12, and the bottom of the cell 1 is against a plurality of ribs 22, so that the pole 11 is located between two adjacent ribs 22 , and the bottom of the cell 1 , the bottom plate 21 and two adjacent ribs 22 enclose an exhaust passage 24 , and the explosion-proof valve 12 faces the exhaust passage 24 and communicates with the exhaust passage 24 .

Several ribs 22 are arranged at intervals on the top of the bottom plate 21, and the poles 11 and explosion-proof valves 12 of several battery cells 1 are set downward, and the bottom of the battery cell 1 is placed against the plurality of ribs 22, Make the pole 11 face down and be located between two adjacent ribs 22 , so that the space in the Z direction can be saved, and the space utilization rate of the chassis of the automobile can be higher. At the same time, several ribs 22 protrude upwards from the top of the bottom plate 21, and an exhaust channel 24 is enclosed between the bottom of the battery cell 1, the bottom plate 21 and two adjacent ribs 22, and the exhaust channel 24 is formed at the bottom of the tray 2. The channel 24 is connected with the explosion-proof valve 12. After the thermal runaway of the battery cell 1, the high-temperature gas can be discharged through the exhaust channel 24 without directly increasing the temperature of the bottom of the car cockpit, thereby greatly improving the safety of the battery pack after the thermal runaway. safety.

As shown in Fig. 2, Fig. 3, Fig. 4 and Fig. 5, a pole area 23 is enclosed between the bottom of the cell 1, the bottom plate 21 and two adjacent ribs 22, and the pole area 23 is connected with the exhaust channel 24. They are separated by ribs 22 , and the poles 11 are located in the pole area 23 . A plurality of ribs 22 are arranged at intervals on the top of the bottom plate 21 and protrude upwards. The bottom of the cell 1 abuts against the plurality of ribs 22 to form a pole area 23 and an exhaust channel 24. The pole area 23 is used for To accommodate the pole 11 to save space in the Z direction, the exhaust channel 24 is used to exhaust high-temperature gas to improve the safety of the battery pack. The pole area 23 and the exhaust channel 24 are separated by ribs 22 , so that the high-temperature gas in the exhaust channel 24 will not flow into the pole area 23 , further improving the safety of the battery pack.

In this embodiment, two poles 11 and an explosion-proof valve 12 are provided at the bottom of each cell 1 , the two poles 11 are positive and negative respectively, and the explosion-proof valve 12 is located between the two poles 11 . The bottom of each battery cell 1 abuts against the four ribs 22 and forms two pole areas 23 and an exhaust channel 24, the two pole areas 23 and one exhaust channel 24 are connected to the two poles respectively. 11 corresponds to an explosion-proof valve 12.

Several ribs 22 and the bottom plate 21 can be integrally formed. The bottom plate 21 and several ribs 22 are manufactured by integral molding, which is convenient to manufacture, and the connection structure has high strength, which greatly improves the stability of the tray 2 . Of course, in other embodiments, the ribs 22 and the bottom plate 21 have a split structure, and the ribs 22 and the bottom plate 21 are connected in a detachable manner, and the installation position of the ribs 22 can be adjusted according to the size of the battery cell 1 .

Wherein, there is a weight-reducing cavity 25 inside the bottom plate 21 and/or the rib 22 . Through the weight-reducing cavity 25, the overall weight of the tray 2 can be effectively reduced and the cost of the battery pack can be reduced.

As shown in Figure 2, Figure 3, Figure 6 and Figure 7, the battery pack also includes an insulating support 3, the insulating support 3 is arranged between the tray 2 and several battery cells 1, and the insulating support 3 extends to the pole In the area 23, there is a gap between the pole 11 and the tray 2. The insulating support 3 has a good insulating effect, and the insulating support 3 is arranged between the tray 2 and the battery cell 1, so that there is a gap between the pole 11 and the tray 2 without contact, which greatly improves the safety of the battery pack sex.

The insulating support 3 has a plurality of through holes 31, and the battery pack also includes a plurality of pole connecting pieces 4, the poles 11 extend into the through holes 31, and the two ends of the pole connecting pieces 4 respectively extend into the two through holes 31 and is connected with the poles 11 in the two through holes 31. The pole connecting pieces 4 extend into the two through holes 31 and are used to connect the poles 11 of two adjacent battery cells 1 , and through a plurality of pole connecting pieces 4 realize the alignment along the length and/or width direction of the tray 2 . Several battery cells 1 arranged in an array are electrically connected, and it is more convenient to realize the phase connection of the battery cells 1 by using the pole connecting piece 4 . At the same time, the pole connecting piece 4 is inserted into the through hole 31 , so that the pole connecting piece 4 is connected with the pole 11 and has a gap with the tray 2 , thereby improving the safety of the battery pack. Moreover, the through hole 31 can be opened on the insulating support member 3 to install, the structure is simple, and the processing is convenient.

The pole connection piece 4 is made of aluminum, which has good electrical conductivity and low cost. Of course, the pole connecting piece 4 can also be made of other conductive materials. The pole connecting piece 4 is welded to the pole 11, so that the connection strength between the pole connecting piece 4 and the pole 11 is high, further improving the safety and stability of the battery pack.

In this embodiment, the bottom of the insulating support 3 facing the bottom plate 21 has at least one step portion 32 , and the step portion 32 fits against the rib 22 and/or the bottom plate 21 . The step portion 32 makes the insulating support 3 abut against the tray 2 , which is very convenient for installation and connection; and ensures a gap between the pole connection piece 4 located in the through hole 31 and the tray 2 , which has higher safety and stability.

Wherein, the inner wall surface of the through hole 31 has an inwardly extending abutment portion, and the pole connection piece 4 is located in the through hole and fits against the abutment portion, so that the installation of the pole connection piece 4 is more accurate and convenient, and It is ensured that there is a gap between the pole connecting piece 4 and the tray 2, and the safety and stability are higher.

The insulating support 3 is bonded to the tray 2 . The insulating support 3 is connected to the tray 2 by bonding, which is very convenient for installation and connection, and further strengthens the connection strength between the insulating support 3 and the tray 2, effectively avoiding the deviation of the insulating support 3 during use. The phenomenon of displacement and dislocation greatly improves the safety and stability of the battery pack.

The battery cell 1 is bonded to the insulating support 3 . The battery cell 1 is connected to the insulating support 3 by bonding, which is very convenient to install and connect, and further strengthens the connection strength between the insulating support 3 and the battery 1, effectively avoiding the gap between the battery 1 and the insulating support 3. The offset and dislocation phenomenon occurs during use, which greatly improves the safety and stability of the battery pack.

As shown in Fig. 1, Fig. 8 and Fig. 9, the battery pack also includes several liquid cooling plates 5, which have cooling channels inside, and several liquid cooling plates 5 and several battery cells 1 along the length of the tray 2 And/or cross-stacked and arranged in the tray 2 in the width direction, so that any battery cell 1 has a liquid cooling plate 5 on both sides. The liquid cooling plate 5 is connected to an external cooling system, and the external cooling system is used to provide cooling liquid so that the cooling liquid can flow into the cooling channel of the liquid cooling plate 5 . By setting the liquid cooling plate 5 on both sides of the battery cell 1, the two sides of the battery cell 1 will correspond to the cooling channels of the liquid cooling plate 5, so that the high temperature generated by the battery cell 1 will interact with the cooling liquid in the cooling channel. Heat exchange can reduce the temperature of the battery cell 1, effectively prevent the temperature of the battery cell 1 from being too high, improve the temperature uniformity of the battery pack, and greatly improve the safety and service life of the battery pack.

In this embodiment, the two ends of the liquid cooling plate 5 are exposed on the outer surface of the battery cell 1 and are provided with connecting joints, through which two adjacent liquid cooling plates 5 are connected to realize several liquid cooling plates 5 The cooling channels are connected. And it is connected with the external cooling system through the connecting joint.

Although the specific implementation of the utility model has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, but these changes and modifications all fall within the protection scope of the present utility model.

Claims (10)

1. A battery pack, characterized in that it comprises: A tray, the tray includes a bottom plate and several ribs, and several ribs are arranged at intervals on the top of the bottom plate; battery cells, several of the battery cells are arranged in arrays in the tray along the length and width directions of the tray; The bottom of the battery core is provided with a pole and an explosion-proof valve, and the bottom of the battery core is against a plurality of the ribs, so that the pole is located between two adjacent ribs, and the An exhaust channel is enclosed between the bottom of the battery cell, the bottom plate and two adjacent ribs, and the explosion-proof valve faces and communicates with the exhaust channel. 2. The battery pack according to claim 1, wherein a pole area is enclosed between the bottom of the battery cell, the bottom plate, and two adjacent ribs, and the pole area is in contact with the pole area. The exhaust passages are separated by the ribs, and the pole is located in the pole area. 3. The battery pack according to claim 2, characterized in that, the battery pack further comprises an insulating support, the insulating support is arranged between the tray and several of the cells, and the insulating The supporting member protrudes into the region of the pole, so that there is a gap between the pole and the tray. 4. The battery pack according to claim 3, wherein the insulating support has a plurality of through holes, and the battery pack further comprises a plurality of pole connecting pieces, and the poles extend into the through holes. In the hole, the two ends of the pole connecting piece protrude into the two through holes respectively and are connected with the poles in the two through holes. 5 . The battery pack according to claim 4 , wherein the pole connecting piece is made of aluminum; and/or, the pole connecting piece is welded to the pole. 6 . The battery pack according to claim 3 , wherein the bottom of the insulating support member facing the bottom plate has at least one step portion, and the step portion fits against the rib and/or the bottom plate. 7 . The battery pack according to claim 3 , wherein the insulating support is bonded to the tray; and/or the battery cell is bonded to the insulating support. 8. The battery pack according to claim 1, characterized in that, the battery pack further comprises several liquid cooling plates, the liquid cooling plates have cooling passages inside, and the several liquid cooling plates are connected to the several cooling channels. The cells are stacked and arranged crosswise in the tray along the length and/or width direction of the tray, so that any one of the cells has the liquid cooling plate on both sides. 9 . The battery pack according to claim 1 , wherein several ribs are integrally formed with the bottom plate. 10 . The battery pack according to claim 1 , wherein there is a weight-reducing cavity inside the bottom plate and/or the rib. 11 .

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