CN115966806A - Liquid cooling battery box and power battery package - Google Patents

Abstract

The invention relates to the technical field of power battery manufacturing, in particular to a liquid-cooled battery box and a power battery pack. The joint component through with the liquid cooling board runs through the case shell setting, realize that liquid cooling system coolant liquid is imported and exported and battery package shell coolant liquid is imported and exported integrated, reduce the joint pipeline of traditional structure, reduce the use of liquid cooling battery box structure, and therefore, the cost is reduced, avoid the coolant liquid leakage risk that the tube coupling brought, be favorable to improving whole package security, and simultaneously, joint pipeline occupation space has been reduced, can reduce the influence to battery package volume under the condition of realizing battery box liquid cooling function, reduce the influence to battery energy density. The power battery pack disclosed by the invention is strong in heat dissipation capability, high in safety and high in energy density.

Description

Liquid cooling battery box and power battery package

Technical Field

The invention relates to the technical field of power battery manufacturing, in particular to a liquid-cooled battery box and a power battery pack.

Background

The energy density of the battery is the electric energy released by the average unit volume or mass of the battery, the power battery is developed towards flattening and integration as the energy density requirement of the power battery is continuously improved, the high nickel anode and the silicon carbon cathode become the mainstream technical route, but at the same time, the temperature sensitivity window of the power battery is more and more obvious, so that the performance, the safety and the cycle life of the power battery are seriously influenced, the safety of a battery pack is paid more and more attention, the cooling mode of the conventional power battery mainly comprises liquid cooling and natural convection air cooling, the natural convection air cooling has larger influence on the ambient temperature of the convection air cooling, the heat dissipation effect is poorer than that of the liquid cooling, the normal work of a cooling system is an important measure for efficiently ensuring the safety of the battery pack, and the liquid cooling of the power battery pack is a necessary trend for development.

However, the liquid cooling system and the battery pack shell of the conventional power battery are provided with independent cooling liquid inlets and outlets, the cooling liquid inlets and outlets of the liquid cooling system need to be connected to the cooling liquid inlets and outlets of the battery pack shell through joint pipelines, and the joint pipelines occupy the internal space of the battery pack, so that the energy density of the battery is reduced, and the cooling liquid leakage phenomenon easily occurs at the joint positions, thereby causing the loss of the cooling liquid and affecting the safety of the power battery.

Therefore, there is a need for a technical solution to solve the technical problems that the conventional power battery liquid cooling system is connected to the coolant inlet and outlet of the battery pack case through the joint pipeline, occupies the internal space of the battery pack, reduces the energy density of the battery, and is prone to leakage of the coolant, which affects the safety of the power battery.

Disclosure of Invention

The invention aims to: the liquid cooling battery box comprises a battery pack shell, a liquid cooling system, a connector pipeline, a liquid cooling system and a power battery pack.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a liquid cooling battery box, includes the case shell, set up the liquid cooling board in the case shell, set up the liquid cooling runner in the liquid cooling board, the liquid cooling board sets up the joint component, the joint component intercommunication the liquid cooling runner, the joint component is constructed and is passed the case shell.

According to the liquid-cooled battery box, the joint component of the liquid-cooled plate penetrates through the box shell, so that the cooling liquid inlet and outlet of the liquid-cooled plate penetrates through the cooling liquid inlet and outlet of the battery pack shell, the integration of the cooling liquid inlet and outlet of a liquid-cooled system and the cooling liquid inlet and outlet of the battery pack shell is realized, the joint pipeline of the traditional structure is reduced, the use of the structural component of the liquid-cooled battery box is reduced, the cost is reduced, the risk of leakage of the cooling liquid caused by pipeline connection is avoided, the whole-pack safety is improved, meanwhile, the occupied space of the joint pipeline is reduced, the influence on the whole-pack volume can be reduced under the condition of realizing the liquid-cooled function of the battery box, the influence on the energy density of a battery is reduced, meanwhile, the joint component directly penetrates through the box shell, the connection distance between the liquid-cooled plate and an external cooling liquid supply mechanism is shortened, the full utilization of the cooling liquid is realized, the energy consumption required by conveying of the cooling liquid is reduced, and the energy-saving effect is achieved.

In a preferred embodiment of the invention, the outer wall of the joint member is provided with an extension plate, and the extension plate is connected with the inner wall of the cabinet in a sealing manner so as to increase the contact surface between the joint member and the cabinet. The sealing performance of the contact surface of the joint member and the box shell is improved, and the integral sealing performance of the box shell is further improved.

In a preferred embodiment of the present invention, a seal is provided between the extension plate and the inner wall of the cabinet. To further improve the overall hermeticity of the cabinet.

As a preferred embodiment of the present invention, the liquid cooling plate includes a runner plate and a cover plate, the runner plate is provided with a stamping runner, the runner plate and the cover plate are fastened and connected to form the liquid cooling runner, and the joint member is vertically connected to the cover plate, so as to reduce the occupation of the internal space of the cabinet by the joint member. The liquid cooling plate simple structure, the shaping of liquid cooling runner is easy, the reduction in preparation cost, simultaneously, the apron is owing to not set up the punching press runner, more level and more smooth than the runner plate, joint member and comparatively smooth cover connection, make things convenient for the stable setting of joint member, and joint member and liquid cooling plate are perpendicular, do not occupy the inside transverse space of case shell at liquid cooling plate face place, be favorable to realizing the maximize of liquid cooling plate, make liquid cooling plate cover face and the adaptation of case shell inner chamber, be favorable to increasing the liquid cooling area, improve the heat radiation strength.

As a preferable aspect of the present invention, the inner wall of the joint member and the punching flow passage are in smooth transition. The smooth inlet and/or outlet of the cooling liquid are realized, and the cooling effect is enhanced.

As a preferable aspect of the present invention, the case includes a tray and a case cover, and the liquid cooling plate and the tray define a battery mounting cavity. Make the liquid cooling board be close to the case lid setting, be located the battery top when using, reduce the volume that occupies of liquid cooling board to case shell inner space to carry out the liquid cooling heat dissipation on the heat ascending route, improve the heat-sinking capability.

As a preferable aspect of the present invention, the flow field plate is provided on a side close to the case cover. The cover plate which is relatively flat is close to or attached to the battery side, so that the heat dissipation area is increased, and the heat dissipation capability is further improved.

As a preferable aspect of the present invention, the tray is provided with a sleeve fitted to the joint member. The position of the liquid cooling plate relative to the box shell is fixed by matching the joint member with the sleeve, the structural stability of the liquid cooling plate is improved, the stable use of the liquid cooling battery box is ensured, and the safety of the battery pack is improved.

As a preferable scheme of the present invention, the tray and the case cover are respectively provided with a frame extending outward of the case cover, and the tray and the case cover are detachably connected through the frame. The connection position that makes tray and case lid does not occupy case shell inner space, forms the rule inner chamber in the case shell to do benefit to the setting of liquid cooling board and battery box interior battery module, improve case shell inner space utilization.

As a preferable aspect of the present invention, the tray is recessed or protruded from the rim to form a first connection portion, the case cover is provided with a second connection portion at the rim, the first connection portion and the second connection portion are combined to form a joint installation cavity, the liquid cooling plate is provided with an extension portion, the extension portion is arranged in the joint installation cavity, and the joint member is connected to the extension portion. The special-shaped structure that caves in or evaginates through tray and case lid provides the mounted position for the joint member, further enlarges the covering surface of liquid cooling board, reduces the setting of joint member and to the occupation of case shell inner space, improves the radiating strength, and makes joint member and battery can the subregion set up, avoids the coolant liquid to leak the influence to the battery.

As a preferable aspect of the present invention, the joint means includes an inlet joint and/or an outlet joint. According to actual conditions, the liquid inlet connector and the liquid outlet connector are arranged in one connector mounting cavity, and can also be separately arranged in an independent connector mounting cavity, so that liquid cooling battery boxes with different structural styles are formed.

As a preferable scheme of the present invention, the extension portion is provided with a liquid inlet channel convergence portion and/or a liquid outlet channel convergence portion, the liquid inlet channel convergence portion is used for connecting the liquid inlet joint, and the liquid outlet channel convergence portion is used for connecting the liquid outlet joint.

The utility model provides a power battery package, has as above a liquid cooling battery box, arrange in the liquid cooling battery box and set up a plurality of battery module.

According to the power battery pack, the liquid cooling battery box with the integrated structure of the cooling liquid inlet and the cooling liquid outlet of the battery pack shell and the cooling liquid inlet and the cooling liquid outlet of the liquid cooling system is adopted, so that the influence of the arrangement of a liquid cooling structure on the whole volume of the power battery pack is reduced, the heat dissipation capacity of the liquid cooling plate is strong, and the improvement of the whole safety and the energy density of the power battery pack is facilitated.

In summary, due to the adoption of the technical scheme, the liquid cooling battery box has the beneficial effects that:

1. the integration of a cooling liquid inlet and a cooling liquid outlet of the liquid cooling system and a cooling liquid inlet and a cooling liquid outlet of the battery pack shell is realized, and joint pipelines of the traditional structure are reduced;

2. the use of liquid cooling battery box structural parts is reduced, and the cost is reduced;

3. the risk of leakage of cooling liquid caused by pipeline connection is avoided, and the safety of the whole package is improved;

4. the occupied space of a joint pipeline is reduced, the influence on the volume of the whole pack can be reduced under the condition of realizing the liquid cooling function of the battery box, and the influence on the energy density of the battery is reduced;

5. the joint component directly penetrates through the box shell, so that the connection distance between the liquid cooling plate and an external cooling liquid supply mechanism is shortened, the full utilization of cooling liquid is realized, the energy consumption required by cooling liquid conveying is reduced, and the energy-saving effect is achieved;

the power battery pack has the beneficial effects that:

through adopting the liquid cooling battery box of the above-mentioned liquid cooling system coolant liquid import and export integration structure with battery package shell coolant liquid import and export, reduce the influence that the liquid cooling structure set up whole volume to the power battery package, the liquid cooling board heat-sinking capability is strong, is favorable to improving the whole security and the energy density of power battery package.

Drawings

Fig. 1 is a schematic view of a liquid-cooled battery box according to the present invention;

FIG. 2 is a front view of a liquid cooled battery box of the present invention;

FIG. 3 is a right side view of a liquid cooled battery box of the present invention;

FIG. 4 is a bottom view of a liquid cooled battery box of the present invention;

FIG. 5 isbase:Sub>A first schematic view of the structure of section A-A in FIG. 4;

FIG. 6 isbase:Sub>A second structural view taken along the line A-A in FIG. 4;

FIG. 7 is a first schematic view of the combination of the liquid cooling plate and the tray in the present invention;

FIG. 8 is a front view of FIG. 6;

FIG. 9 is a schematic view of the construction of the liquid-cooled panel of the present invention;

FIG. 10 is a second schematic view of the combination of the liquid cooling plate and the tray of the present invention;

FIG. 11 is an enlarged partial schematic view of FIG. 10 at B;

FIG. 12 is an isometric view of a power battery pack of the present invention;

fig. 13 is a schematic cross-sectional view of a power battery pack according to the present invention.

Icon:

1-case shell, 11-tray, 111-first connection part, 12-case lid, 121-second connection part, 13-sleeve, 14-frame, 2-liquid cooling plate, 21-liquid cooling flow channel, 211-liquid inlet flow channel convergence part, 212-liquid outlet flow channel convergence part, 22-flow channel plate, 23-cover plate, 24-extension part, 3-joint component, 31-extension plate, 32-liquid inlet joint, 33-liquid outlet joint, 4-sealing part, 5-battery installation cavity, 6-joint installation cavity, and 7-battery module.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

Example 1

As shown in fig. 1 to 11, a liquid-cooled battery box of the present embodiment includes a box housing 1, a liquid-cooled plate 2 is disposed in the box housing 1, a liquid-cooled flow passage 21 is disposed in the liquid-cooled plate 2, a joint member 3 is disposed on the liquid-cooled plate 2, the joint member 3 communicates with the liquid-cooled flow passage 21, and the joint member 3 is configured to penetrate through the box housing 1.

Wherein, case shell 1 is used for providing the chamber that holds of battery installation, and liquid cooling board 2 is constructed into platelike structure, and the tiling sets up in case shell 1, forms the battery box of taking the liquid cooling function.

Specifically, compare in the battery box of the forced air cooling radiating mode under the natural convection, liquid cooling mode radiating effect is better, and simultaneously, 2 thicknesses of liquid cooling board are thinner, and is less to the influence of case shell 1 inner space, compare in the battery box of the forced air cooling radiating mode under the natural convection, the whole volume of battery box is equal, realizes that the radiating effect under the same volume size is showing and improves, is favorable to improving power battery security.

Preferably, with reference to fig. 5-6, said joint means 3 comprise an inlet joint 32 for feeding the cooling liquid into the liquid-cooled plate 2 and an outlet joint 33 for feeding the cooling liquid out of the liquid-cooled plate 2.

In this embodiment, the inlet connector 32 and the outlet connector 33 are constructed as pipe joints of sleeve structural members, extend through the cabinet 1 by their lengths, and are connected with an external cooling liquid supply mechanism at the end portion extending out of the cabinet 1, and the circulation flow of the cooling liquid inside and outside the cabinet 1 is realized by the powered external cooling liquid supply mechanism.

Preferably, in this embodiment, referring to fig. 5 to 6, the liquid inlet joint 32 and the liquid outlet joint 33 are both straight pipe joints, and the joint member 3 penetrates through the top or the bottom of the case housing 1 in the direction of its own axis, compared with the existing liquid cooling battery case with a liquid cooling system, the joint member 3 does not occupy the internal space of the case housing 1, the surface area of the liquid cooling plate 2 can be enlarged to match with the internal cavity of the case housing 1, and the liquid cooling heat dissipation area in the case housing 1 is increased under the condition that the overall volume of the battery case is not changed, so that the heat dissipation capacity of the battery case is further improved.

In addition, because the liquid inlet joint 32 and the liquid outlet joint 33 do not occupy the internal space of the case shell 1, the liquid inlet joint 32 and the liquid outlet joint 33 can penetrate through any position of the case shell 1 according to actual conditions, only the condition that the joint member 3 penetrates through the case shell 1 is needed, the joint member can be vertically communicated with the liquid cooling plate 2 in the case shell 1, the selectable installation position of the joint member 3 is wide, the liquid cooling battery box with the structure is favorably matched with different application environments, the universality is improved, the preparation cost is favorably reduced, meanwhile, the liquid cooling plate 2 in the case shell 1 is connected with the external cooling liquid supply mechanism through the joint member 3 with the shortest distance, the cooling liquid conveying distance between the external cooling liquid supply mechanism and the liquid cooling plate 2 in the case shell 1 is shorter, the smooth conveying of the cooling liquid can be realized through smaller energy, the energy consumption for conveying the cooling liquid is reduced, and the energy-saving effect is achieved.

A liquid cooling battery box of this embodiment, the joint component 3 through 2 with the liquid cooling board runs through case shell 1 setting, realize that the liquid cooling system coolant liquid is imported and exported and the integration setting of battery package shell coolant liquid import and export, reduce the joint pipeline of traditional liquid cooling system, reduce the use of liquid cooling battery box structure, therefore, the carrier wave prepaid electric energy meter is low in cost, simultaneously, can avoid the coolant liquid leakage risk that the joint pipeline connection brought, be favorable to improving whole package security, and simultaneously, joint pipeline occupation space has been reduced, can reduce the influence to whole package volume under the condition of realizing battery box liquid cooling function, reduce the influence of liquid cooling system setting to battery package energy density, applicable in conventional battery module, the liquid cooling of batteries such as blade battery holds.

Example 2

As shown in fig. 1-11, in the liquid-cooled battery box of the present embodiment, on the basis of embodiment 1, an extension plate 31 is disposed on an outer wall of the joint member 3, and the extension plate 31 is connected with an inner wall of the box housing 1 in a sealing manner, so as to increase a contact surface between the joint member 3 and the box housing 1.

Preferably, in this embodiment, the joint member 3 includes an inlet connector 32 and an outlet connector 33 which are separately arranged, the extension plate 31 is configured as a disc-shaped flat plate structure member arranged on the outer wall of the joint member 3, the extension plate 31 and the joint member 3 are integrally machined, prepared and molded or mounted by conventional connection methods such as threads, sleeving, bonding and the like, when in use, the joint member 3 penetrates through a through hole which is preset in the cabinet 1, the extension member 31 is in sealing connection with the inner wall of the cabinet 1, the sealing between the joint member 3 and the cabinet 1 is realized by surface contact, and the integral sealing performance of the cabinet 1 is improved.

Preferably, extension board 31 with set up sealing member 4 between the shell 1 inner wall of case to improve the whole leakproofness of shell, sealing member 4 includes the structure that rubber sheet, compression foam etc. provide sealed effect through self flexible change.

Example 3

As shown in fig. 1 to 11, in the liquid-cooled battery box of the present embodiment, on the basis of embodiment 1 and embodiment 2, the liquid-cooled plate 2 includes a runner plate 22 and a cover plate 23, the runner plate 22 is provided with a stamped runner, the runner plate 22 and the cover plate 23 are connected in a snap-fit manner to form the liquid-cooled runner 21, and the joint member 3 is vertically connected to the cover plate 23.

Specifically, runner plate 22 is constructed for the plate body structure including the punching press runner, apron 23 is constructed for the flat panel structure, and apron 23 and runner plate 22 lock welding, shaping liquid cooling runner 21, liquid cooling board 2 can adopt the metal material that the thermal conductivity is high, including but not limited to aluminium, copper and its alloy, can realize the heat exchange heat dissipation through the coolant liquid of inside flow and metal outer wall.

Preferably, case shell 1 with liquid cold plate 2 all can adopt the high metal material structure of heat conductivity to the radiating effect of furthest's improvement liquid cooling battery box sets up the battery module to liquid cooling battery box back, and liquid cold plate 2 can be according to actual conditions laminating battery module setting, is favorable to increasing the effective heat radiating area between battery module and the liquid cold plate 2.

A liquid cooling battery box of this embodiment, 2 simple structures of liquid cooling board, the shaping of liquid cooling runner 21 is easy, the reduction preparation cost, joint member 3 is connected with comparatively smooth apron 23 is perpendicular, make things convenient for joint member 3's stable setting, in order to realize making joint member 3 run through case shell 1 setting under the condition of shortest length joint member 3, and joint member 3 can be according to actual conditions, set up the optional position at 2 faces of liquid cooling board, be favorable to improving the commonality of liquid cooling battery box, and simultaneously, under 1 inner chamber of limited case shell, joint member 3 does not occupy the space of 1 any transverse direction of case shell, can realize the area coverage maximize of liquid cooling board 2, increase the liquid cooling area, the heat dissipation strength is improved.

In addition, for prior art's joint pipeline structure, the 3 lengths of joint member of this embodiment are shorter, have effectively shortened the distance of liquid cooling plate 2 with outside coolant liquid supply mechanism, have reduced the heat exchange loss of coolant liquid, make the coolant liquid obtain effectual utilization, are favorable to improving the utilization efficiency of coolant liquid, under the equal cooling effect condition, reduce the power loss of carrying the coolant liquid, reach energy-conserving effect.

Preferably, the inner wall of the joint member 3 is smoothly transited to the stamping flow channel.

Specifically, the stamping flow channel is configured to have smooth edges during preparation, and after the joint member 3 is connected with the liquid cooling plate 2, the joint member 3 and the edge of the stamping flow channel are in smooth transition, so that the flow of cooling liquid is not obstructed, the cooling liquid can smoothly enter and output, the flow speed is kept consistent before and after passing through the joint member 3, the temperature loss is reduced, and the cooling effect is enhanced.

Example 4

As shown in fig. 1 to 11, in the liquid-cooled battery box of the present embodiment, based on embodiments 1 to 3, the box housing 1 includes a tray 11 and a box cover 12, the liquid-cooled plate 2 and the tray 11 define a battery mounting chamber 5, and the flow field plate 22 is disposed on a side close to the box cover 12.

Specifically, refer to fig. 8, the runner plate 22 that constitutes liquid cooling board 2 is because the shaping has the punching press runner, one side that apron 23 was kept away from at runner plate 22 can have a plurality of rib structures, during the use, the laminating of liquid cooling board 2 that has the rib structure/be close to case lid 12 setting, form heat exchange space between liquid cooling board 2 and case lid 12, realize the liquid cooling heat dissipation of liquid cooling board 2 and the heat exchange heat dissipation of liquid cooling board 2 and case lid 12 simultaneously on the heat ascending path, improve the whole heat-sinking capability of liquid cooling battery box.

In addition, the liquid cooling plate 2 is far away from the tray 11 and is arranged above the battery, so that the liquid cooling plate can be effectively prevented from deforming and leaking due to the impact of broken stones, kerbs and the like, the long-time effectiveness of a liquid cooling system is ensured, and the safety of the battery pack is improved.

Meanwhile, the cover plate 23 forming the liquid cooling plate 2 can be attached to/close to the battery when in use due to the fact that the surface is smooth, the effective heat dissipation area can be enlarged on a heat rising path, and the overall heat dissipation capacity of the liquid cooling battery box is further improved.

Example 5

As shown in fig. 1 to 11, in the liquid-cooled battery box of the present embodiment, in addition to embodiment 4, the tray 11 is provided with a sleeve 13 which is fitted to the joint member 3.

Specifically, referring to fig. 6, the sleeve 13 is configured to be provided with a channel matched with the shape of the joint member 3, the sleeve 13 is welded on the outer wall of the tray 11, in use, the liquid cooling plate 2 is positioned by matching the joint member 3 with the sleeve 13, the positioning of the height of the liquid cooling plate 2 in the case shell 1 is realized by matching the extension plate 31 with the tray 11, the arrangement structure of the liquid cooling plate 2 is stable, the position of the case shell 1 is fixed relatively, the structural stability of the liquid cooling plate 2 is improved, the stable use of the liquid cooling battery case is further ensured, and the improvement of the safety of the battery pack is facilitated.

In addition, the liquid cooling plate 2 is arranged close to the box cover 12 side, the sleeve 13 is arranged on the outer wall of the tray 11, so that cooling liquid is input from a low position to a high position and is output from the high position to the low position, the position of the cooling liquid input and output box shell 1 is closer to the bottom of the liquid cooling battery box, the cooling liquid can enter the box shell 1 at a lower position to play a role, and the power requirement of an external cooling liquid supply mechanism is reduced under the condition of the same heat dissipation effect.

Example 6

As shown in fig. 1 to 11, in the liquid-cooled battery box of the present embodiment, on the basis of embodiment 1, the tray 11 and the box cover 12 are respectively provided with a frame 14 extending outward from the box housing 1, and the tray 11 and the box cover 12 are detachably connected through the frame 14.

Specifically, frame 14 extends towards case shell 1 is outer, makes tray 11 and case lid 12 connect the back, and the connection position does not occupy case shell 1 inner space to form comparatively regular inner chamber in case shell 1, can improve case shell 1 inner space utilization with the battery module adaptation of cuboid, slice isotructure rule.

Preferably, the tray 11 is recessed or protruded inwardly at the rim 14 to form a first connection portion 111, the cover 12 is provided with a second connection portion 121 at the rim 14, the first connection portion 111 and the second connection portion 121 are combined to form a joint installation cavity 6, the liquid cooling plate 2 is provided with an extension portion 24, the extension portion 24 is arranged in the joint installation cavity 6, and the joint member 3 is connected to the extension portion 24.

In this embodiment, tray 11 is in frame 14 department is sunken to form in the case shell 1 first connecting portion 111, case lid 12 is in frame 14 department is protruding to case shell 1 is formed outward second connecting portion 121, behind first connecting portion 111 and the lock of second connecting portion 121, form joint installation cavity 6, form the joint member 3 mounted position who is independent of battery installation cavity 5, make joint member 3 and battery module 7 subregion setting, avoid the influence of coolant liquid leakage to battery module 7, and simultaneously, in the thickness direction of case shell 1, joint installation cavity 6 is more close to case lid 12 side setting, can run through case shell 1 through the joint member 3 of shorter length, shorten joint member 3 extension length, reduce the flow distance of coolant liquid in the inside and outside exchange process of case shell 1, improve the utilization efficiency of coolant liquid, and then reduce the energy consumption that is used for carrying the coolant liquid.

Further, the extension portion 24 is a protruding portion formed by extending the edge of the liquid cooling plate 2 along the plate surface, the extension portion 24 is disposed in the connector installation cavity 6, and the connector component 3 is connected to the extension portion 24. So that the tab member 3 is disposed without occupying the battery mounting cavity 5 space.

Specifically, the joint member 3 includes an inlet joint 32 and an outlet joint 33, referring to fig. 5-6, the inlet joint 32 and the outlet joint 33 are located in the same joint installation cavity 6, it can be understood that the inlet joint 32 and the outlet joint 33 may also be respectively disposed in different joint installation cavities 6 according to actual conditions, and the liquid cooling plate 2 may be provided with one or more extension portions 24 according to actual conditions, so as to form liquid cooling battery boxes of different structural styles, so as to implement adaptation of the liquid cooling battery boxes to different envelope environments.

Preferably, the extension portion 24 is provided with a liquid inlet flow channel gathering portion 211 and/or a liquid outlet flow channel gathering portion 212 communicated with the liquid cooling flow channel 21, the liquid inlet flow channel gathering portion 211 is used for connecting the liquid inlet connector 32, the liquid outlet flow channel gathering portion 212 is used for connecting the liquid outlet connector 33, so that the input cooling liquid is dispersed from the extension portion 24, the output cooling liquid is output after the extension portion 24 converges, effective heat dissipation of all positions in the box shell 1 is achieved, in addition, the extension portion 24 does not occupy the space of the battery installation cavity 5, the covering surface of the liquid cooling plate 2 can be further enlarged, and the overall heat dissipation capacity of the liquid cooling battery box is further improved.

Example 7

As shown in fig. 12-13, a power battery pack has a liquid-cooled battery box as described above, and a plurality of battery modules 7 are arranged in the liquid-cooled battery box.

The power battery pack of this embodiment, through adopting the liquid cooling battery box of above-mentioned liquid cooling system coolant liquid import and export and battery package shell coolant liquid import and export integration structure, reduce the influence of liquid cooling structure setting to the whole volume of power battery pack, liquid cooling board 2 heat-sinking capability is strong, is favorable to improving the whole security and the energy density of power battery pack, can be applicable to the installation of batteries such as battery module 7, blade battery.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (13)

1. The utility model provides a liquid cooling battery box, its characterized in that includes case shell (1), set up liquid cooling board (2) in case shell (1), set up liquid cooling runner (21) in liquid cooling board (2), liquid cooling board (2) set up joint component (3), joint component (3) intercommunication liquid cooling runner (21), joint component (3) are constructed as passing case shell (1).

2. A liquid-cooled battery box according to claim 1, characterized in that the outer wall of the joint member (3) is provided with an extension plate (31), and the extension plate (31) is in sealing connection with the inner wall of the box housing (1) to increase the contact surface of the joint member (3) with the box housing (1).

3. A liquid-cooled battery box according to claim 2, characterized in that a seal (4) is provided between the extension plate (31) and the inner wall of the box housing (1).

4. A liquid-cooled battery box according to any of claims 1-3, characterized in that the liquid-cooled plate (2) comprises a runner plate (22) and a cover plate (23), the runner plate (22) is provided with stamped runners, the runner plate (22) and the cover plate (23) are snap-fitted to form the liquid-cooled runners (21), and the joint member (3) is perpendicularly attached to the cover plate (23) to reduce the space occupied by the joint member (3) inside the box housing (1).

5. A liquid-cooled battery box according to claim 4, characterized in that the inner wall of the joint member (3) is smoothly transitioned with the stamped flow channel.

6. A liquid-cooled battery box according to claim 4, characterized in that the box housing (1) comprises a tray (11) and a box cover (12), the liquid-cooled plate (2) and the tray (11) defining a battery mounting cavity (5).

7. A liquid-cooled battery box according to claim 6, characterized in that the flow field plate (22) is arranged on the side close to the box cover (12).

8. A liquid-cooled battery box according to claim 6, characterized in that the tray (11) is provided with sleeves (13) adapted to the joint members (3).

9. A liquid-cooled battery box according to claim 6, characterized in that the tray (11) and the lid (12) are each provided with a rim (14) extending towards the outside of the box housing (1), the tray (11) and the lid (12) being detachably connected by means of the rims (14).

10. A liquid-cooled battery box according to claim 9, characterized in that the tray (11) is recessed or protruded at the rim (14) to form a first connecting portion (111), the cover (12) is provided with a second connecting portion (121) at the rim (14), the first connecting portion (111) and the second connecting portion (121) are combined to form a joint mounting chamber (6), the liquid-cooled plate (2) is provided with an extending portion (24), the extending portion (24) is provided in the joint mounting chamber (6), and the joint member (3) is connected to the extending portion (24).

11. A liquid-cooled battery box according to claim 10, characterized in that the joint member (3) comprises an inlet joint (32) and/or an outlet joint (33).

12. A liquid-cooled battery box according to claim 11, characterized in that the extending portion (24) is provided with a liquid inlet channel converging portion (211) and/or a liquid outlet channel converging portion (212), the liquid inlet channel converging portion (211) is used for connecting the liquid inlet joint (32), and the liquid outlet channel converging portion (212) is used for connecting the liquid outlet joint (33).

13. A power battery pack, characterized in that, a liquid-cooled battery box according to any one of claims 1-12 is provided, and a plurality of battery modules (7) are arranged in the liquid-cooled battery box.

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