CN220491971U - Power battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a power battery pack which comprises a cooling box and a battery pack, wherein the cooling box comprises a side plate, a middle side plate and a bottom plate, the side plate extends along a first direction, the side plate is connected with the bottom plate and defines an accommodating space, the middle side plate is arranged in the accommodating space and is connected with the bottom plate to define a plurality of first accommodating grooves in the accommodating space, the battery pack is arranged in the first accommodating grooves, the side plate is provided with a first side runner, the middle side plate is provided with a second side runner, the bottom plate is provided with a first bottom runner and a second bottom runner, the first side runner is communicated with the first bottom runner to form a first runner, and the second side runner is communicated with the second bottom runner to form a second runner. The power battery pack disclosed by the utility model has the advantages that the cooling efficiency of the battery pack is improved, the influence on the battery performance caused by the long-term high-temperature state of the battery is avoided, and the use safety is improved.

Description

Power battery pack

Technical Field

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

Background

In recent years, with the continuous development of new energy automobiles, a power battery pack is widely used as a power source of a new energy battery in the new energy automobiles. At present, a thermal management system mainly has cooling modes such as natural cooling, air cooling or liquid cooling, wherein the cooling performance of a liquid cooling system is best, the application is wider, a general cooling device is arranged at the bottom or the top of a battery pack, the cooling efficiency is low, and the heat dissipation requirement cannot be met.

Disclosure of Invention

The purpose of the utility model is that: the power battery pack improves the cooling efficiency of the battery pack, avoids the influence on the battery performance caused by the long-term high-temperature state of the battery, and improves the use safety.

In order to achieve the above object, the present utility model provides a power battery pack, including a cooling box and a battery pack, the cooling box includes a side plate extending along a first direction, a middle side plate, and a bottom plate, the side plate and the bottom plate are connected and define an accommodating space, the middle side plate is disposed in the accommodating space and connected to the bottom plate to define a plurality of first accommodating grooves in the accommodating space, the battery pack is disposed in the first accommodating grooves, the side plate is provided with a first side flow channel, the middle side plate is provided with a second side flow channel, the bottom plate is provided with a first bottom flow channel and a second bottom flow channel, the first side flow channel is communicated with the first bottom flow channel to form a first flow channel, and the second side flow channel is communicated with the second bottom flow channel to form a second flow channel.

As the preferred scheme, the cooling box still includes the end plate, limit board with the bottom plate is connected with along at least one end of first direction the end plate, the end plate is equipped with inlet channel and drain flow channel, first runner with the second runner intercommunication the inlet channel with the drain flow channel is in order to form the liquid cooling return circuit.

Preferably, the bottom plate comprises a first plate body, a supporting plate and a second plate body which are sequentially connected in a third direction, the first bottom runner and the second bottom runner are located between the first plate body and the second plate body, the supporting plate is located between the first bottom runner and the second bottom runner in a second direction, and the first direction, the second direction and the third direction are intersected in pairs.

Preferably, in the third direction, projections of the support plate and the battery pack on the bottom plate at least partially overlap.

Preferably, the support plates include a plurality of first support plates and a plurality of second support plates, the plurality of first support plates are arranged at intervals along the second direction, at least one second support plate is arranged between adjacent first support plates, and an included angle is formed between at least one second support plate and the first support plate.

As a preferred scheme, the side plate comprises a side plate body, a first side cover plate extending along a second direction and a second side cover plate extending along a third direction and connected with the bottom plate, wherein two sides of the first side cover plate are respectively connected with one end of the side plate body, which is far away from the bottom plate, of the second side cover plate, and the first side runner is defined.

As a preferred scheme, the power battery pack further comprises a battery fixing frame, the battery fixing frame is arranged in the first accommodating groove, the battery fixing frame is provided with a plurality of battery mounting grooves, the battery pack comprises a plurality of single batteries, and at least one single battery is arranged in the battery mounting grooves.

As a preferred scheme, the battery fixing frame comprises a connecting piece and a plurality of fixing brackets, wherein the fixing brackets are distributed along a first direction, the fixing brackets are provided with battery mounting grooves which face the same end of the first direction, two ends of the fixing brackets along a second direction are respectively provided with fixing holes which extend along the first direction, and the connecting piece extends along the first direction and is inserted into the fixing holes.

As a preferable scheme, the fixed support is respectively connected with fixed blocks along two sides of the second direction, the fixed blocks are respectively provided with inserting grooves and inserting blocks at two opposite ends of the second direction, the inserting blocks are located at one end far away from the fixed support, and the adjacent inserting blocks of the fixed support are in inserting fit with the inserting grooves.

Preferably, the fixing support is connected with fixing blocks along two sides of the second direction respectively, and the fixing blocks are borne on one side, away from the bottom plate, of the first side cover plate.

Preferably, the power battery pack further comprises an electrical module, wherein the electrical module is installed in the first accommodating groove and located at one end of the battery pack along the first direction, and at least one of the first side runner, the first bottom runner and the second bottom runner is connected with the electrical module.

Compared with the prior art, the power battery pack has the beneficial effects that: the battery pack comprises a cooling box and a battery pack, wherein the cooling box comprises a side plate, a middle side plate and a bottom plate which extend along a first direction, and the side plate and the bottom plate are connected to define an accommodating space. The middle side plate is arranged in the accommodating space and connected with the bottom plate to define a first accommodating groove in the accommodating space, the battery pack is arranged in the first accommodating groove, preliminary position limiting is achieved on the battery pack through the first accommodating groove, the battery pack is kept in the first accommodating groove, the side plate is provided with a first side runner, the middle side plate is provided with a second side runner, the bottom plate is provided with a first bottom runner and a second bottom runner, the first side runner is communicated with the first bottom runner to form a first runner, the second side runner is communicated with the second bottom runner to form a second runner, the first side runner, the second side runner, the first bottom runner and the second bottom runner are cooling runners in the cooling box, and cooling liquid passes through the cooling runners. The limit board is located the relative both sides of group battery respectively with well curb plate, and the bottom plate is located the bottom surface of group battery, and first runner and second runner all extend along first direction to make the bottom surface of group battery and two sides have the coolant liquid to pass through respectively, in order to realize carrying out the synchronous cooling to group battery a plurality of faces, play temperature control's effect, promote the cooling efficiency of group battery, avoid the battery to be in the high temperature state for a long time and influence battery performance, avoid thermal runaway, promote safety in utilization. Meanwhile, the battery pack is isolated from the cooling liquid phase in the cooling flow channel through the cooling box, physical protection of the battery pack is improved, short circuit of the battery is avoided, and use safety of the battery is improved.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a battery pack and an electrical module 4 according to an embodiment of the present utility model mounted in a cooling box.

Fig. 3 is a schematic structural view of a cooling tank according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of a first flow channel and a second flow channel according to an embodiment of the present utility model.

Fig. 5 is a sectional view showing a flow passage structure in a cooling tank according to an embodiment of the present utility model.

Fig. 6 is a schematic structural view of a support plate according to an embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of a single battery mounted on a battery holder according to an embodiment of the present utility model.

Fig. 8 is a schematic view of a battery holder according to an embodiment of the present utility model.

Fig. 9 is an enlarged schematic view of the structure at a in fig. 8 according to an embodiment of the present utility model.

Fig. 10 is a schematic structural view of a fixing bracket according to an embodiment of the present utility model.

FIG. 11 is a schematic view of a frame according to an embodiment of the present utility model.

Fig. 12 is a split view of the internal structure of an embodiment of the present utility model.

In the figure:

1. a cooling box; 11. side plates; 111. a side plate body; 112. a first side cover plate; 113. a second side cover plate; 114. a first side flow passage; 12. a middle side plate; 121. a second side flow passage; 13. a bottom plate; 131. a first plate body; 132. a support plate; 1321. a first support plate; 1322. a second support plate; 133. a first bottom flow channel; 134. a second bottom flow channel; 135. a second plate body; 14. a first accommodation groove; 15. a first flow passage; 16. a second flow passage; 17. collecting flow channels; 18. an end plate; 181. a liquid inlet flow channel; 182. a liquid outlet channel; 19. a second accommodation groove; 20. an induction member; 21. a cover plate; 22. a middle partition plate;

3. a battery holder; 31. a battery mounting groove; 311. a first limit part; 312. a second limit part; 32. a fixed bracket; 321. a fixing hole; 33. a fixed block; 331. a plug-in groove; 332. a plug block; 35. a frame; 351. a connection hole; 352. a connecting block; 36. a connecting piece;

4. electrical module

5. A battery pack; 51. a single battery;

x, a first direction; y, second direction; z, third direction.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the present utility model are based on the orientation or positional relationship 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 apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the terms "connected," "fixed," and the like are used in the present utility model in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; the mechanical connection can be realized, and the welding connection can be realized; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1 to 12, a power battery pack according to a preferred embodiment of the present utility model includes a cooling box 1 and a battery pack 5, the cooling box 1 includes a side plate 11 extending in a first direction X, a middle side plate 12, and a bottom plate 13, the side plate 11 and the bottom plate 13 being connected to define an accommodating space, the middle side plate 12 being disposed in the accommodating space and connected to the bottom plate 13 to define a plurality of first accommodating grooves 14 in the accommodating space, the battery pack 5 being disposed in the first accommodating groove 14, the side plate 11 being provided with a first side flow channel 114, the middle side plate 12 being provided with a second side flow channel 121, the bottom plate 13 being provided with a first bottom flow channel 133 and a second bottom flow channel 134, the first side flow channel 114 being in communication with the first bottom flow channel 133 to form a first flow channel 15, the second side flow channel 121 being in communication with the second bottom flow channel 134 to form a second flow channel 16.

The power battery pack of the utility model comprises a cooling box 1 and a battery pack 5, wherein the cooling box 1 comprises a side plate 11, a middle side plate 12 and a bottom plate 13 which extend along a first direction X, and the side plate 11 and the bottom plate 13 are connected to define an accommodating space. The middle side plate 12 is arranged in the accommodating space and connected with the bottom plate 13 to define a first accommodating groove 14 in the accommodating space, the battery pack 5 is arranged in the first accommodating groove 14, preliminary position limitation is realized on the battery pack 5 through the first accommodating groove 14, the battery pack 5 is kept in the first accommodating groove 14, the side plate 11 is provided with a first side runner 114, the middle side plate 12 is provided with a second side runner 121, the bottom plate 13 is provided with a first bottom runner 133 and a second bottom runner, the first side runner 114 is communicated with the first bottom runner 133 to form a first runner 15, the second side runner 121 is communicated with the second bottom runner 134 to form a second runner 16, and cooling liquid passes through the cooling runners in the cooling box 1. The limit curb plate 11 and well curb plate 12 are located the relative both sides of group battery 5 respectively, and bottom plate 13 is located the bottom surface of group battery 5, and first runner 15 and second runner 16 all extend along first direction X to make the bottom surface of group battery 5 have the coolant liquid to pass through respectively with two sides, in order to realize carrying out synchronous cooling to group battery 5 a plurality of faces, play temperature control's effect, promote the cooling efficiency of group battery 5, avoid the battery to be in the high temperature state for a long time and influence battery performance, avoid thermal runaway, promote safety in utilization. Meanwhile, the battery pack 5 is isolated from the cooling liquid phase in the cooling flow channel through the cooling box 1, physical protection of the battery pack 5 is improved, short circuit of the battery is avoided, and use safety of the battery is improved.

Further, the cooling box 1 further includes an end plate 18, at least one end of the side plate 11 and the bottom plate 13 along the first direction X is connected with the end plate 18, the end plate 18 is provided with a liquid inlet channel 181 and a liquid outlet channel 182, and the first flow channel 15 and the second flow channel 16 are communicated with the liquid inlet channel 181 and the liquid outlet channel 182 to form a liquid cooling loop. The end plate 18 is located the both ends of bottom plate 13 in first direction X, and end plate 18 is equipped with inlet channel 181 and play liquid runner 182, and the coolant liquid gets into the cooling flow channel in the cooling tank 1 from inlet channel 181, and first runner 15 and second runner 16 communicate with inlet channel 181 respectively, and the coolant liquid is through first runner 15 and second runner 16 in order to take away group battery 5 heat, and first runner 15 and second runner 16 communicate with play liquid runner 182 respectively, and the coolant liquid of absorption heat flows out cooling tank 1 from play liquid runner 182, realizes the circulation flow of coolant liquid through the cooling circuit.

As one example, the end plates 18 are connected to both ends of the side plate 11 and the bottom plate 13 in the first direction X. The liquid inlet channel 181 and the liquid outlet channel 182 may be disposed on the same end plate 18, or may be disposed on different end plates 18.

As one embodiment, two end plates 18 are respectively connected to two ends of the bottom plate 13, wherein one end plate 18 is provided with a liquid inlet channel 181, and the other end plate 18 is provided with a liquid outlet channel 182, and two ends of the first channel 15 and the second channel 16 in the first direction X are respectively communicated with the liquid inlet channel 181 and the liquid outlet channel 182. The cooling liquid flows in from one end of the bottom plate 13 and flows out from the other end of the bottom plate 13, so that the cooling liquid which absorbs heat is prevented from flowing back, and the cooling effect is improved.

As one embodiment, the liquid inlet channel 181 is located near the battery pack 5, and the liquid outlet channel 182 is arranged on the battery pack 5, so that the cooling liquid with a lower temperature preferably takes away the heat of the battery pack 5 in the cooling box 1, and the cooling effect of the battery pack 5 is improved.

As one example, the cooling tank 1 is provided with collecting channels 17 at both ends in the first direction X, both ends of the first channel 15 are respectively communicated with the liquid inlet channel 181 and the liquid outlet channel 182 through the collecting channels 17, and both ends of the second channel 16 are respectively communicated with the liquid inlet channel 181 and the liquid outlet channel 182 through the collecting channels 17. The two ends of the first flow channel 15 and the second flow channel 16 in the first direction X are respectively communicated with the liquid inlet flow channel 181 and the liquid outlet flow channel 182 through the converging flow channel 17, the first flow channel 15 and the second flow channel 16 extend along the first direction X, the converging flow channel 17 extends along the second direction Y, and the cooling liquid enters the first flow channel 15, the second flow channel 16 or the liquid outlet flow channel 182 after being converged and buffered in the converging flow channel, so that the whole flow of the cooling liquid is more stable.

Further, the bottom plate 13 includes a first plate 131, a support plate 132 and a second plate 135 sequentially connected in a third direction Z, the first bottom runner 133 and the second bottom runner 134 are located between the first plate 131 and the second plate 135, the support plate 132 is located between the first bottom runner 133 and the second bottom runner 134 in a second direction Y, and the first direction X, the second direction Y and the third direction Z intersect two by two. Because the first plate 131 and the second plate 135 are hollow structures, the first bottom runner 133 and the second bottom runner 134 are located between the first plate 131 and the second plate 135, and the cooling liquid flows in the first bottom runner 133 and the second bottom runner 134 to cool the battery pack 5, the support plates 132 are respectively connected with the first plate 131 and the second plate 135 at both ends of the third direction Z, and the support plates 132 are located between the first bottom runner 133 and the second bottom runner 134 in the second direction Y to enhance the support structure strength of the bottom plate 13.

Further, along the third direction Z, the projections of the support plate 132 and the battery pack 5 on the plane of the bottom plate 13 at least partially overlap, specifically, the support plate 132 may be located below the battery pack 5 along the third direction Z. The backup pad 132 is located the one end of group battery 5 in third direction Z, plays the supporting role to group battery 5, promotes the bottom plate 13 to the supporting strength of group battery 5, prevents that bottom plate 13 from warping, avoids bottom plate 13 to warp and reduces the cross-sectional area that flows of first end runner 133 and second end runner 134, guarantees the circulation of coolant liquid, guarantees the cooling radiating effect.

Further, the support plates 132 include a plurality of first support plates 1321 and a plurality of second support plates 1322, the plurality of first support plates 1321 are disposed at intervals along the second direction Y, at least one second support plate 1322 is disposed between adjacent first support plates 1321, and an included angle is formed between at least one second support plate 1322 and the first support plate 1321. As one embodiment, the first support plate 1321 extends along the third direction Z, the second support plate 1322 is disposed obliquely to the third direction Z, and an included angle is formed between the first support plate 1321 and the second support plate 1322. Or, the second support plate 1322 extends along the third direction Z, the first support plate 1321 is obliquely arranged relative to the third direction Z, and an included angle is formed between the first support plate 1321 and the second support plate 1322. The first support plate 1321 and the second support plate 1322 are respectively located between the first plate 131 and the second plate 135, and support both the first plate 131 and the second plate 135.

As one embodiment, a second support plate 1322 is disposed between adjacent first support plates 1321, one side of the first support plate 1321 intersects with one side of the second support plate 1322 and is connected to the first plate body 131, and the other side of the first support plate 1321 and the other side of the second support plate 1322 are respectively connected to the second plate body 135. The first support plate 1321, the second support plate 1322 and the first plate body 131 form a triangular support structure, and the first support plate 1321, the second support plate 1322 and the second plate body 135 form a triangular support structure, so that the support stability of the first support plate 1321 and the second support plate 1322 to the battery pack 5 is improved.

Further, the side plate 11 includes a side plate body 111, a first side cover plate 112 extending along the second direction Y, and a second side cover plate 113 extending along the third direction Z and connected to the bottom plate 13, where two sides of the first side cover plate 112 are respectively connected to the side plate body 111 and one end of the second side cover plate 113 away from the bottom plate 13, and define a first side flow channel 114. The first side cover plate 112 and the second side cover plate 113 are located at one side of the bottom plate 13 facing the battery pack 5, and heat of the battery pack 5 is transferred to cooling liquid of the first side flow channel 114 through the first side cover plate 112 and the second side cover plate 113 respectively, and heat of the battery pack 5 is taken away through the cooling liquid. As one embodiment, the first side cover plate 112 and the second side cover plate 113 are respectively attached to the battery pack 5, so that the distance between the first side cover plate 112 and the second side cover plate 113 and the battery pack 5 is shortened, the heat transfer time is shortened, and the cooling efficiency is improved.

As one embodiment, the first bottom flow channel 133 is located at one side of the bottom plate 13 in the second direction Y, the lower end of the side plate 111 is connected to the second plate 135, and the second side cover 113 is connected to the first plate 131 to define the first side flow channel 114, so that the first side flow channel 114 is L-shaped, the contact area with the battery pack 5 is increased, and the heat dissipation and cooling efficiency of the liquid cooling system of the battery pack 5 is improved.

Further, the power battery pack further includes a battery holder 3, the battery holder 3 is disposed in the first accommodating groove 14, and the battery holder 3 defines a plurality of battery mounting grooves 31, and the battery pack 5 includes a plurality of unit batteries 51, and at least one unit battery 51 is disposed in the battery mounting groove 31. The battery fixing frame 3 is arranged in the first accommodating groove 14, the battery fixing frame 3 is provided with a plurality of battery mounting grooves 31 for accommodating the single batteries 51, the battery fixing frame 3 plays a role in fixing and limiting the single batteries 51, and meanwhile, the strength of the assembled structure of the battery pack 5 is improved.

Further, the battery fixing frame 3 includes a connecting member 36 and a plurality of fixing brackets 32, the plurality of fixing brackets 32 are arranged along the first direction X, the plurality of fixing brackets 32 are provided with battery mounting grooves 31 facing the same end of the first direction X, two ends of the fixing brackets 32 along the second direction Y are respectively provided with fixing holes 321 extending along the first direction X, and the connecting member 36 extends along the first direction X and is inserted into the fixing holes 321. The fixed bolster 32 is equipped with battery mounting groove 31, and battery cell 51 installs in battery mounting groove 31, and fixed bolster 32 is equipped with fixed orifices 321 respectively at second direction Y's both ends, and connecting piece 36 is pegged graft in a plurality of fixed orifices 321 along first direction X in order to realize the connection of a plurality of fixed bolsters 32, need not to beat the glue, has saved curing time, promotes the packaging efficiency of group battery 5. The displacement and the stress of the battery pack 5 are detected in real time, the battery pack 5 is convenient to install and maintain daily in the cooling box 1, and the maintenance cost is low.

As one example, the battery holder 3 is made of an insulating material. A single battery 51 is installed in one battery installation groove 31, and has an insulating effect on adjacent battery cells, so that the use safety of the battery pack 5 is improved.

As one embodiment, the connecting piece 36 is a screw and a nut, the screw passes through the fixing holes 321 along the first direction X, the end of the screw is connected and fixed through the nut, the assembly mode is simple, the operation is convenient, one screw can be connected with the fixing hole 321 at the same end in the second direction Y, and the assembly efficiency is high.

Further, two sides of the fixed support 32 along the second direction Y are respectively connected with a fixed block 33, two opposite ends of the fixed block 33 along the second direction Y are respectively provided with a plugging groove 331 and a plugging block 332, the plugging block 332 is located at one end far away from the fixed support 32, and the plugging blocks 332 and the plugging grooves 331 of the adjacent fixed supports 32 are in plugging fit. As one example, the fixing hole 321 is provided in the fixing block 33. Through the grafting cooperation of grafting groove 331 and grafting piece 332, realize the connection of adjacent fixed bolster 32, simultaneously, avoid taking place relative rotation around first direction X after the fixed bolster 32 that is adjacent in second direction Y connects, realize spacing to fixed bolster 32.

Further, two sides of the fixing bracket 32 along the second direction Y are respectively connected with a fixing block 33, and the fixing blocks 33 are carried on one side of the first side cover plate 112 away from the bottom plate 13. The first side cover plate 112 performs bearing positioning on the fixing bracket 32 through the fixing block 33, and prevents the fixing bracket 32 from moving in the second direction Y and the third direction Z.

As one embodiment, the fixing bracket 32 includes a first limiting portion 311 and a second limiting portion 312 extending along the third direction Z, the first limiting portion 311 is connected to one end of the second limiting portion 312 away from the bottom plate 13, and the first limiting portion 311 and the second limiting portion 312 protrude toward one side of the battery cell to form a slot wall of the battery mounting slot 31. The single battery 51 is installed in the battery installation groove 31, and the first limiting portion 311 limits the single battery 51 in the third direction Z, so as to prevent the single battery 51 from sliding out toward the end, away from the bottom plate 13, of the third direction Z. The second stopper 312 restricts the unit cell 51 in the second direction Y, and holds the unit cell 51 in the battery mounting groove 31. As one embodiment, the first limiting portion 311 and the second limiting portion 312 are respectively attached to the surface of the single battery 51, so as to reduce abnormal noise after assembly.

As one of the embodiments, the battery fixing frame 3 includes a frame 35, two ends of the frame 35 along the second direction Y are respectively provided with a connection hole 351 extending along the first direction X, the frame 35 is mounted on a notch of the battery mounting groove 31, and the frame 35 is respectively mounted on the connection hole 351 and the fixing hole 321 through a connection piece 36 to achieve connection with the fixing bracket 32. The plurality of fixing brackets 32 are arranged in a row along the first direction X, the notch of the battery mounting groove 31 of the fixing bracket 32 faces to and is connected with the adjacent fixing brackets 32 in the first direction X to close the notch of the battery mounting groove 31, and the fixing bracket 32 positioned at the upper end part of the first direction X closes the notch of the battery mounting groove 31 through the frame 35 to ensure that the single battery 51 at the most end part is kept in the battery mounting groove 31 of the fixing bracket 32.

As one embodiment, two sides of the frame 35 along the second direction Y are respectively connected with a connection block 352, and the connection hole 351 is opened in the connection block 352. The connection member 36 is connected with the connection block 352 through the connection hole 351 to achieve connection of the frame 35 with the fixing bracket 32.

Further, the power battery pack further includes an electrical module 4, and the electrical module 4 is mounted in the first accommodating groove 14 and located at one end of the battery pack 5 along the first direction X, and at least one of the first side flow channel 114, the first bottom flow channel 133 and the second bottom flow channel 134 is connected to the electrical module 4. Wherein, the electric module 4 may be a BMS module or a BDU module, the first side flow channel 114, the first bottom flow channel 133 and the second bottom flow channel 134 all extend along the first direction X, and at least one of the first side flow channel 114, the first bottom flow channel 133 and the second bottom flow channel 134 is connected with the electric module 4 to realize cooling of the electric module 4. As one embodiment, the first side flow channel 114, the first bottom flow channel 133 and the second bottom flow channel 134 flow through the electric module 4 in the first direction X, thereby enhancing the cooling effect on the electric module 4.

As one of the embodiments, the cooling box 1 includes a middle partition plate 22, and the middle partition plate 22 is connected to the bottom plate 13 and divided into a first accommodation groove 14 and a second accommodation groove 19 along the first direction X, and the electrical module 4 is mounted in the second accommodation groove 19. Divide into first holding tank 14 and second holding tank 19 in with cooling tank 1 through intermediate plate 22, first holding tank 14 provides installation space for group battery 5, and second holding tank 19 provides installation space for electric module 4, preliminary division is restricted to the installation space of group battery 5 and electric module 4 through intermediate plate 22, avoids mutual interference between group battery 5 and the electric module 4.

As one example, the power battery pack further includes a sensing member 20 for sensing stress and displacement of the battery pack 5, the sensing member 20 is installed between the battery pack 5 and the base plate 13, and the sensing member 20 is electrically connected with the BMS module. As one example, sensing element 20 is a strain gauge. The foil gage is installed in the bottom of fixed bolster 32, and the foil gage is along with self tensile and compression, and its resistance can change, and response speed is fast, and the foil gage changes information transmission to BMS module with the resistance, monitors the condition of electric core, guarantees the safety of battery package. Meanwhile, the strain gauge has low energy consumption in working, is simple and convenient to install and maintain in daily life, and has low cost.

In summary, an embodiment of the present utility model provides a power battery pack including a cooling box 1 and a battery pack 5, wherein the cooling box 1 includes an edge side plate 11 extending in a first direction X, a middle side plate 12, and a bottom plate 13, and the edge side plate 11 and the bottom plate 13 are connected to define an accommodating space. The middle side plate 12 is arranged in the accommodating space and connected with the bottom plate 13 to define a first accommodating groove 14 in the accommodating space, the battery pack 5 is arranged in the first accommodating groove 14, preliminary position limitation is realized on the battery pack 5 through the first accommodating groove 14, the battery pack 5 is kept in the first accommodating groove 14, the side plate 11 is provided with a first side runner 114, the middle side plate 12 is provided with a second side runner 121, the bottom plate 13 is provided with a first bottom runner 133 and a second bottom runner, the first side runner 114 is communicated with the first bottom runner 133 to form a first runner 15, the second side runner 121 is communicated with the second bottom runner 134 to form a second runner 16, and cooling liquid passes through the cooling runners in the cooling box 1. The limit curb plate 11 and well curb plate 12 are located the relative both sides of group battery 5 respectively, and bottom plate 13 is located the bottom surface of group battery 5, and first runner 15 and second runner 16 all extend along first direction X to make the bottom surface of group battery 5 have the coolant liquid to pass through respectively with two sides, in order to realize carrying out synchronous cooling to group battery 5 a plurality of faces, play temperature control's effect, promote the cooling efficiency of group battery 5, avoid the battery to be in the high temperature state for a long time and influence battery performance, avoid thermal runaway, promote safety in utilization. Meanwhile, the battery pack 5 is isolated from the cooling liquid phase in the cooling flow channel through the cooling box 1, physical protection of the battery pack 5 is improved, short circuit of the battery is avoided, and use safety of the battery is improved.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (11)

1. A power battery pack, characterized in that: including cooling tank (1) and group battery (5), cooling tank (1) include limit curb plate (11), well curb plate (12) and bottom plate (13) that extend along first direction (X), limit curb plate (11) with bottom plate (13) are connected and are limited accommodation space, well curb plate (12) set up in accommodation space and connect in bottom plate (13) in order to inject a plurality of first holding tank (14) in accommodation space, group battery (5) set up in first holding tank (14), limit curb plate (11) are equipped with first side runner (114), well curb plate (12) are equipped with second side runner (121), bottom plate (13) are equipped with first end runner (133) and second end runner (134), first side runner (114) with first end runner (133) intercommunication forms first runner (15), second side runner (121) with second end runner (134) intercommunication forms second runner (16).

2. The power cell pack of claim 1, wherein: the cooling box (1) further comprises an end plate (18), at least one end of the side plate (11) and the bottom plate (13) along a first direction (X) is connected with the end plate (18), the end plate (18) is provided with a liquid inlet flow channel (181) and a liquid outlet flow channel (182), and the first flow channel (15) and the second flow channel (16) are communicated with the liquid inlet flow channel (181) and the liquid outlet flow channel (182) to form a liquid cooling loop.

3. The power cell pack of claim 1, wherein: the bottom plate (13) comprises a first plate body (131), a support plate (132) and a second plate body (135) which are sequentially connected in a third direction (Z), wherein a first bottom runner (133) and a second bottom runner (134) are defined between the first plate body (131) and the second plate body (135), the support plate (132) is positioned between the first bottom runner (133) and the second bottom runner (134) in a second direction (Y), and the first direction (X), the second direction (Y) and the third direction (X) are intersected in two.

4. A power cell pack as claimed in claim 3, wherein: along the third direction (Z), the projections of the support plate (132) and the battery pack (5) on the plane of the bottom plate (13) are at least partially overlapped.

5. A power cell pack as claimed in claim 3, wherein: the support plates (132) comprise a plurality of first support plates (1321) and a plurality of second support plates (1322), the first support plates (1321) are arranged at intervals along a second direction (Y), at least one second support plate (1322) is arranged between every two adjacent first support plates (1321), and an included angle is formed between each second support plate (1322) and each first support plate (1321).

6. The power cell pack of claim 1, wherein: the side plate (11) comprises a side plate body (111), a first side cover plate (112) extending along a second direction (Y) and a second side cover plate (113) extending along a third direction (Z) and connected with the bottom plate (13), wherein two sides of the first side cover plate (112) are respectively connected with one end of the side plate body (111) and one end of the second side cover plate (113) away from the bottom plate (13) and define a first side flow passage (114).

7. The power cell pack of claim 6, wherein: the power battery pack further comprises a battery fixing frame (3), the battery fixing frame (3) is arranged in the first accommodating groove (14), the battery fixing frame (3) is provided with a plurality of battery mounting grooves (31), the battery pack (5) comprises a plurality of single batteries (51), and at least one single battery (51) is arranged in the battery mounting grooves (31).

8. The power cell pack of claim 7, wherein: the battery fixing frame (3) comprises a connecting piece (36) and a plurality of fixing supports (32), wherein the fixing supports (32) are distributed along a first direction (X), the fixing supports (32) are provided with battery mounting grooves (31) which are oriented towards the same end of the first direction (X), two ends of the fixing supports (32) along a second direction (Y) are respectively provided with fixing holes (321) extending along the first direction (X), and the connecting piece (36) extends along the first direction (X) and is inserted into the fixing holes (321).

9. The power cell pack of claim 8, wherein: the fixed support (32) is connected with fixed blocks (33) along both sides of the second direction (Y) respectively, the fixed blocks (33) are provided with inserting grooves (331) and inserting blocks (332) at the opposite ends of the second direction (Y) respectively, the inserting blocks (332) are located at one ends far away from the fixed support (32), and the inserting blocks (332) of the adjacent fixed supports (32) are in inserting fit with the inserting grooves (331).

10. The power cell pack of claim 8, wherein: the fixed support (32) is connected with fixed blocks (33) along two sides of the second direction (Y) respectively, and the fixed blocks (33) are borne on one side, far away from the bottom plate (13), of the first side cover plate (112).

11. The power cell pack of claim 1, wherein: the power battery pack further comprises an electric module (4), wherein the electric module (4) is installed in the first accommodating groove (14) and located at one end of the battery pack (5) along the first direction (X), and at least one of the first side flow channel (114), the first bottom flow channel (133) and the second bottom flow channel (134) is connected with the electric module (4).