CN214043820U

CN214043820U - Liquid cooling battery box and battery package

Info

Publication number: CN214043820U
Application number: CN202023171080.7U
Authority: CN
Inventors: 肖鹏; 蔡鹏�; 梁先豫; 汤杰; 阎明瀚; 江吉兵
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-08-24
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a liquid cooling battery box reaches battery package including this liquid cooling box. The liquid cooling battery box includes box and case lid, the inside of box has one end open-ended holding tank, the holding tank is used for holding battery module and battery management system, the notch of case lid shutoff holding tank, the bottom of holding tank has the bottom plate, the bottom plate is including the first plate section that connects gradually, second plate section and third plate section, first plate section is parallel with third plate section, and the third plate section is located the top of first plate section, the slope of second plate section sets up between first plate section and third plate section, the battery module is placed on first plate section, battery management system places on the third plate section, the inside of first plate section and the inside of third plate section all are provided with the coolant liquid runner, the coolant liquid runner is used for circulating cooling liquid, the inside of third plate section is provided with the circulation passageway, the circulation passageway communicates the coolant liquid runner of first plate section and second plate section respectively. It has optimized the box inner space, and the security is high.

Description

Liquid cooling battery box and battery package

Technical Field

The utility model relates to a battery technology field especially relates to a liquid cooling battery box and including battery package of this liquid cooling battery box.

Background

Currently, battery packs are widely used in vehicles due to their excellent characteristics such as high energy density and long cycle life. The Battery pack comprises a Battery box body, a Battery module and a Battery Management System (Battery Management System), wherein the Battery module and the Battery Management System are arranged in a containing groove of the Battery box body, and the Battery module generates heat during charging and discharging and the Battery Management System runs, so that the Battery module and the Battery Management System need to be cooled. The liquid cooling is the cooling mode that the battery package was used always, to having the battery package of difference in height between the mounting plane of battery module and the mounting plane of battery management system, adopts the structure that cold liquid board and pipeline combined together usually, but the cold liquid board combines together with the pipeline and occupies that the space of battery box inside is great, and the weeping risk is great, leads to the battery package short circuit because the weeping easily, and the security is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides a liquid cooling battery box and battery package, it has optimized box inner space, and the security is high.

In order to achieve the purpose, the utility model adopts the following technical proposal:

providing a liquid-cooled battery box body, which comprises a box body and a box cover, wherein a containing groove with an opening at one end is formed in the box body, the containing groove is used for containing a battery module and a battery management system, the box cover seals a notch of the containing groove, a bottom plate is arranged at the bottom of the containing groove, the bottom plate comprises a first plate section, a second plate section and a third plate section which are sequentially connected, the first plate section is parallel to the third plate section, the third plate section is positioned above the first plate section, the second plate section is obliquely arranged between the first plate section and the third plate section, the battery module is arranged on the first plate section, the battery management system is arranged on the third plate section, cooling liquid flow channels are respectively arranged in the first plate section and the third plate section, the cooling liquid flow channels are used for circulating cooling liquid, and a circulating channel is arranged in the third plate section, the flow passages communicate with the cooling liquid flow passages of the first plate section and the second plate section, respectively.

As a preferable technical solution of the liquid-cooled battery box, the second plate section is inclined downward from the third plate section toward the first plate section.

As an optimal technical scheme of liquid cooling battery box, the third plate section is close to the one end of second plate section is provided with dodges the hole, dodge the hole intercommunication the inside and the outside of holding tank.

As an optimal technical scheme of the liquid cooling battery box body, the third plate section is convexly provided with a liquid inlet connector and a liquid outlet connector, and the liquid inlet connector and the liquid outlet connector are both positioned on the same side of the box body.

As a preferred technical scheme of liquid cooling battery box, the inlet fitting with go out the liquid joint respectively along the width direction interval distribution of box, the third plate section the inside first baffle that is provided with of coolant liquid runner, first baffle with the length direction of box is parallel, first baffle will the third plate section the coolant liquid runner separates and forms the feed liquor runner and goes out the liquid runner, the inlet fitting with the feed liquor runner intercommunication, go out the liquid joint with go out the liquid runner intercommunication.

As a preferable technical scheme of the liquid-cooled battery box body, the liquid inlet connector and the liquid outlet connector are integrally formed with the third plate section.

As an optimal technical scheme of the liquid-cooled battery box body, two circulation channels are arranged inside the second plate section and are distributed at intervals along the width direction of the box body respectively, one of the circulation channels is far away from one end of the first plate section and communicated with the liquid inlet flow channel, and the other circulation channel is far away from one end of the first plate section and communicated with the liquid outlet flow channel.

As an optimal technical scheme of the liquid-cooled battery box body, a plurality of third partition plates are arranged in the cooling liquid flow channel of the first plate section, the third partition plates are parallel to the length direction of the box body, all the third partition plates are distributed along the width direction of the box body at intervals, so that the cooling liquid flow channel on the first plate section is divided into a plurality of flow channel split bodies, and the adjacent two flow channel split bodies are mutually communicated.

As a preferred technical scheme of liquid cooling battery box, the bottom plate comprises first board and second board, one side of first board is concave first recess, second recess and third recess of being equipped with respectively, first recess the second recess with the notch of third recess all faces away from the notch of holding tank, the shutoff of second plate section first recess the second recess with the notch of third recess, the tank bottom of first recess with all form between the second board and between the third recess the coolant liquid runner, the tank bottom of second recess with form between the second board the circulation passageway.

On the other hand, still provide a battery package, including above-mentioned cold liquid battery box.

The utility model has the advantages that: the structure is characterized in that the cooling liquid flow channel and the circulation channel are arranged in the bottom plate of the box body, the liquid cooling assembly and the box battery box body are integrally arranged, an extra pipeline for cooling liquid circulation is not required to be arranged in the box body, the cost of the battery box body is reduced by the pipeline in the box body, the phenomenon of liquid leakage in the pipeline is completely avoided, the space occupied by the liquid cooling assembly is saved, and the space in the box body is favorably optimized.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is an assembly diagram of a battery module and a case according to an embodiment (a case cover is not shown).

Fig. 2 is a schematic view of an angle structure of the box body according to the embodiment (the box cover is not shown in the figure).

Fig. 3 is a schematic structural view of another angle of the box body according to the embodiment (the box cover is not shown in the figure).

Fig. 4 is an exploded view of the case according to the embodiment.

Fig. 5 is an enlarged view of a portion a in fig. 4.

In the figure:

100. a battery module; 200. a box body;

1. a base plate; 101. a first plate section; 102. a second plate section; 103. a third plate section; 104. a first plate; 105. A second plate; 106. a first separator; 107. a second separator; 108. a third partition plate; 109. a fourth separator; 110. a liquid inlet flow channel; 111. a liquid outlet flow passage; 112. a flow-through channel; 113. the flow channel is split; 2. a side plate; 3. a convex plate; 4. avoiding holes; 5. a reinforcing plate; 6. a liquid inlet joint; 7. and a liquid outlet joint.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 5, the utility model provides a liquid cooling battery box, this liquid cooling battery box mainly uses in the battery package. Liquid cooling battery box includes box 200 and case lid (not shown in the figure), and the inside of box 200 has one end open-ended holding tank, and the holding tank is used for holding battery module 100 and battery management system (not shown in the figure), and the notch of case lid shutoff holding tank, holding tank enclose by bottom plate 1 and curb plate 2 and establish the formation, and bottom plate 1 is located the bottom of holding tank. The bottom plate 1 comprises a first plate section 101, a second plate section 102 and a third plate section 103 which are connected in sequence, the first plate section 101 is parallel to the third plate section 103, the third plate section 103 is positioned above the first plate section 101, and the second plate section 102 is obliquely arranged between the first plate section 101 and the third plate section 103. The battery module 100 is placed on the first plate section 101, the battery management system is placed on the third plate section 103, the first plate section 101 is used for carrying the battery module 100, and the third plate section 103 is used for carrying the battery management system. The inside of first plate section 101 and the inside of third plate section 103 all are provided with the coolant flow channel, and the coolant flow channel is used for circulating cooling liquid, and the inside of third plate section 103 is provided with circulation passageway 112, and circulation passageway 112 communicates the coolant flow channel in first plate section 101 and the coolant flow channel in second plate section 102 respectively, inputs cooling liquid to the internal circulation of bottom plate 1 to battery module 100 and the cooling of battery management system in the inside of box 200 make the battery package discharge or charge under the settlement temperature. In practical design, heat conducting plates are arranged between the first plate section 101 and the battery module 100 and between the third plate section 103 and the battery management system, and heat exchange is performed between the bottom plate 1 and the battery module 100 and between the bottom plate 1 and the battery management system through the heat conducting plates, so that the cooling speed of the box body 200 is increased. It can be understood that there is usually a height difference between the battery module 100 and the battery management system, and the height of the battery management system is smaller than the height of the battery module 100, and the third plate section 103 is disposed above the first plate section 101, so that there is a certain height difference between the mounting surface of the battery module 100 and the mounting surface of the battery management system, so that the space inside the accommodating groove is adapted to the heights of the battery module 100 and the battery management system, which is beneficial to improving the space utilization rate inside the case 200. The cooling liquid flow channels are directly arranged in the first plate section 101 and the third plate section 103, and are communicated with the two cooling liquid flow channels through the circulation channel 112 positioned in the second plate section 102, because the battery module 100 is abutted to the first plate section 101, the battery management system is abutted to the third plate section 103, and the cooling liquid can exchange heat with the battery module 100 and the battery management system in the accommodating groove simultaneously in the bottom plate 1, so that the purpose of cooling is realized. The structure is characterized in that the cooling liquid flow channel and the circulation channel 112 are arranged in the bottom plate 1 of the box body 200, the liquid cooling assembly and the box body 200 are integrally arranged, an additional pipeline for cooling liquid circulation is not required to be arranged in the box body 200, the pipeline in the box body 200 is omitted, the cost of the battery box body 200 is reduced, liquid leakage in the pipeline is completely avoided, the space occupied by the liquid cooling assembly is saved, and the space in the box body 200 is favorably optimized.

Preferably, a protruding plate 3 protrudes from one end of the first plate segment 101 close to the second plate segment 102, the protruding plate 3 is located inside the receiving groove, and the protruding plate 3 is used for limiting the battery module 100 from sliding towards the second plate segment 102.

In order to strengthen the overall structural strength of the box body 200, a reinforcing plate 5 is arranged on one side of the second plate section 102, which is located inside the accommodating groove, and one end of the reinforcing plate 5 is connected with the convex plate 3. It is understood that the second plate segment 102 is obliquely disposed between the first plate segment 101 and the third plate segment 103, and the reinforcing plate 5 is disposed on the second plate segment 102 due to the breakage of the second plate segment 102 caused by the battery module 100 and the battery tube as the battery module 100 is placed on the first plate segment 101 and the battery management system is placed on the second plate segment 102. The reinforcing plate 5 reinforces the entire structure of the second plate segment 102, prevents the second plate segment 102 from being broken, and also enhances the impact resistance of the tank 200.

Wherein the second plate segment 102 is inclined downwards from the third plate segment 103 towards the first plate segment 101 to transition the first plate segment 101 and the second plate segment 102 with the second plate segment 102. Specifically, the angle at which the second plate section 102 is inclined downward from the third plate section 103 toward the first plate section 101 is 30 ° to 60 °. The angle at which the second plate section 102 is inclined downward is set within a proper range to avoid the influence of the flow of the cooling liquid due to the excessively high gradient of the flow passage 112. In this embodiment, the angle at which the second plate segment 102 is inclined downward from the third plate segment 103 toward the first plate segment 101 is 30 °.

In one embodiment, an avoiding hole 4 is formed at one end of the third plate segment 103 close to the second plate segment 102, and the avoiding hole 4 communicates with the inside and the outside of the accommodating groove. It can be understood that the battery management system needs to be connected with an external monitoring device by using a wire harness to realize the monitoring of the battery pack. The wire harness on the battery management system runs through the avoiding hole 4 from the inside of the accommodating groove and extends out of the box body 200, so that wiring is facilitated. Specifically, the avoiding hole 4 has a rectangular structure, and the length direction of the avoiding hole 4 is parallel to the width direction of the box body 200. Of course, in the actual design, the shape of the avoidance hole 4 may be flexibly set as needed, and the shape of the avoidance hole 4 is not specifically limited herein. Referring to fig. 1, the X direction in the drawing is the longitudinal direction of the case 200, and the Y direction in the drawing is the width direction of the case 200.

Wherein, the third plate section 103 is convexly provided with a liquid inlet joint 6 and a liquid outlet joint 7, and the liquid inlet joint 6 and the liquid outlet joint 7 are both positioned on the same side of the box body 200. The liquid inlet joint 6 and the liquid outlet joint 7 are connected with a liquid cooling unit arranged outside the box body 200, cooling liquid is input into the cooling liquid flow channel from the liquid inlet joint 6 through the liquid cooling unit, the heated cooling liquid is output into the liquid cooling unit from the liquid outlet joint 7, and the cooled cooling liquid is re-input into the bottom plate 1 through the liquid cooling unit. Because the liquid inlet joint 6 and the liquid outlet joint 7 are both connected with the liquid cooling unit, the liquid inlet joint 6 and the liquid outlet joint 7 are both arranged on the same side of the box body 200, so that the liquid inlet joint 6 and the liquid outlet joint 7 are conveniently connected with the liquid cooling unit.

Preferably, the liquid inlet joint 6 and the liquid outlet joint 7 are integrally formed with the third plate section 103, and joints are completely absent at the joints of the liquid inlet joint 6, the liquid outlet joint 7 and the third plate section 103, so that the phenomenon of liquid leakage is avoided, and the reliability is improved. Specifically, the liquid inlet joint 6 and the liquid outlet joint 7 are integrally formed with the third plate section 103 by means of die casting.

In another embodiment, the liquid inlet joint 6 and the liquid outlet joint 7 may be provided with separate structures with the third plate section 103, for example, a threaded hole is provided on the third plate section 103, both the liquid inlet joint 6 and the liquid outlet joint 7 have external thread structures, and the liquid inlet joint 6 and the liquid outlet joint 7 are screwed into the threaded hole, so that the liquid inlet joint 6 and the liquid outlet joint 7 are detachably connected with the third plate section 103.

Specifically, the liquid inlet joint 6 and the liquid outlet joint 7 are respectively distributed at intervals along the width direction of the box 200, a first partition 106 is arranged inside the cooling liquid flow channel of the third plate section 103, the first partition 106 is parallel to the length direction of the box 200, the cooling liquid flow channel of the third plate section 103 is partitioned by the first partition 106 to form a liquid inlet flow channel 110 and a liquid outlet flow channel 111, the liquid inlet joint 6 is communicated with the liquid inlet flow channel 110, and the liquid outlet joint 7 is communicated with the liquid outlet flow channel 111. The first partition plate 106 is used for separating the cooling liquid flow channel of the third plate section 103 to form a liquid inlet flow channel 110 and a liquid outlet flow channel 111, low-temperature cooling liquid enters the liquid inlet flow channel 110 from the liquid inlet joint 6, the cooling liquid enters the liquid outlet flow channel 111 after passing through the cooling liquid flow channel of the first plate section 101, in the process, the temperature of the cooling liquid can be increased, the heated cooling liquid is discharged to the outside of the box body 200 from the liquid outlet joint 7, and the cooling liquid in the liquid inlet flow channel 110 is effectively prevented from directly flowing to the liquid outlet flow channel 111 without passing through the first plate section 101 due to the existence of the first partition plate 106, so that the utilization rate of the cooling liquid is improved.

Two circulation channels 112 are respectively arranged in the second plate section 102, the two circulation channels 112 are respectively distributed at intervals along the width direction of the box body 200, one end of one circulation channel 112 far away from the first plate section 101 is communicated with the liquid inlet channel 110, and one end of the other circulation channel 112 far away from the first plate section 101 is communicated with the liquid outlet channel 111. Specifically, two flow channels 112 are respectively adjacent to both ends of the avoidance hole 4 in the length direction. After entering the liquid inlet flow channel 110 from the liquid inlet joint 6, the cooling liquid sequentially passes through the flow channel 112 corresponding to the liquid inlet flow channel 110, the liquid flow channel of the first plate section 101, the flow channel 112 corresponding to the liquid outlet flow channel 111 and the liquid outlet flow channel 111, and then flows out of the box body 200 from the liquid outlet joint 7, so that the cooling liquid is conveyed favorably, and the low-temperature cooling liquid is prevented from being mixed with the high-temperature cooling liquid.

Further, a second partition 107 is arranged in each of the liquid inlet channel 110 and the liquid outlet channel 111, the second partition 107 is parallel to the width direction of the box body 200, one end of the second partition 107 is connected with the inner side wall of the liquid inlet channel 110 or the liquid outlet channel 111, the other end of the second partition is spaced from the first partition 106, and the liquid inlet joint 6 and the liquid outlet joint 7 are arranged away from the first partition 106. The second partition 107 is beneficial to increasing the circuitous degree of the liquid inlet flow passage 110 and the liquid outlet flow passage 111, and effectively prolonging the flow path of the cooling liquid.

In order to further extend the flow path of the cooling liquid in the bottom plate 1 in the limited space, a plurality of third partition plates 108 are disposed in the cooling liquid flow channel of the first plate section 101, the third partition plates 108 are parallel to the length direction of the tank 200, all the third partition plates 108 are distributed at intervals along the width direction of the tank 200 to partition the cooling liquid flow channel on the first plate section 101 into a plurality of flow channel sub-bodies 113, and two adjacent flow channel sub-bodies 113 are communicated with each other. In this embodiment, the number of the third partition plates 108 is six, and flow passage split bodies 113 are formed between the third partition plates 108 and the side walls of the first groove in the width direction of the box body 200, and between two adjacent third partition plates 108. Because the two adjacent flow passage split bodies 113 are communicated with each other, the cooling liquid can circulate in each flow passage split body 113, and on one hand, the path of the cooling liquid flowing in the bottom plate 1 is prolonged; on the other hand, it is advantageous to promote the flow of the cooling liquid through the flow passage sub-bodies 113 and to maintain the uniformity of the internal temperature of the bottom plate 1.

As a preferable mode, a fourth partition plate 109 is provided between two adjacent third partition plates 108, one end of the fourth partition plate 109 is connected to the inner wall of the coolant flow passage of the first plate section 101 close to the flow passage 112, and the other end of the fourth partition plate 109 is spaced from the inner wall of the coolant flow passage of the first plate section 101 remote from the flow passage 112, and the coolant is supplied to flow through this space. The fourth partition 109 prevents the cooling liquid from directly flowing between the two flow channels 112, thereby improving the cooling efficiency.

In order to facilitate the processing of the bottom plate 1 and reduce the difficulty in forming the coolant flow channel and the flow channel 112, in this embodiment, the bottom plate 1 is configured as a double-layer structure. The bottom plate 1 is composed of a first plate 104 and a second plate 105, a first groove, a second groove and a third groove are respectively and concavely arranged on one side of the first plate 104, the notches of the first groove, the second groove and the third groove are back to the notches of the accommodating groove, the second plate section 102 blocks the notches of the first groove, the second groove and the third groove, cooling liquid flow channels are formed between the groove bottom of the first groove and the second plate 105 and between the groove bottom of the third groove and the second plate 105, and a flow channel 112 is formed between the groove bottom of the second groove and the second plate 105. Specifically, the second plate 105 is composed of a first split body, a second split body and a third split body, the first split body is parallel to the groove bottom of the first groove, and the first split body blocks the groove of the first groove; the second branch body is parallel to the groove bottom of the second groove and blocks the notch of the second groove; the third split body is parallel to the groove bottom of the second groove, and the third split body plugs the notch of the third groove. In this embodiment, the second sub-body is manually welded to the first sub-body and the third sub-body, respectively. In another embodiment, the first, second, and third components may be integrally formed.

In this embodiment, the liquid inlet joint 6 and the liquid outlet joint 7 are both protruded from the groove wall of the third groove far away from the first groove. The opposite sides of the first partition plate 106 and the second partition plate 107 are respectively connected with the bottom of the third groove and the third split body, and the opposite sides of the third partition plate 108 are respectively connected with the bottom of the first groove and the first split body.

Further, the first split body, the second split body and the third split body are welded to the notch of the first groove, the notch of the second groove and the notch of the third groove in sequence through friction stir welding. In specific implementation, the liquid inlet joint 6 and the liquid outlet joint 7 are pressed on the first plate 104, and then the second plate 105 is welded with the first plate 104.

As a preferred technical scheme, the groove of the first groove, the groove of the second groove and the notch of the third groove all have a step structure, the step structure comprises a first step surface and a second step surface vertically connected with the first step surface, the first step surface is located at one end, close to the accommodating groove, of the second step surface, the upper surface of the first split body, the upper surface of the second split body and the upper surface of the third split body are respectively welded with the corresponding first step surfaces, and the edge of the first split body, the edge of the second split body and the edge of the third split body are respectively abutted against the corresponding second step surfaces. The setting of stair structure can assist second board 105 and first board 104 fast assembly position on the one hand, and on the other hand, first step face provides the space and guarantees the welding area between second board 105 and the first board 104 for the welding of second board 105 and first board 104, improves welded reliability, prevents the weeping.

In this embodiment, the side plate 2 is disposed around the edge of the first plate 104, and the side plate 2 protrudes from the lower surface of the first plate 104, so as to form a step structure between the side plate 2 and the first plate 104, a side surface of the first plate 104 departing from the accommodating groove (i.e., the lower surface of the first plate 104) is a first step surface, and a side surface of the side plate 2 connected to the first plate 104 is a second adjusting surface.

Preferably, a side of the second plate 105 facing away from the receiving groove (i.e., a lower surface of the second plate 105) is flush with a side of the first plate 104 facing away from the receiving groove (i.e., a lower surface of the first plate 104).

In another embodiment, the first plate 104 is integrally manufactured with the second plate 105. The base plate 1 is integrally manufactured and molded by, for example, an extrusion molding process or a press molding process.

This embodiment still provides a battery package, including the liquid cooling battery box of any kind of above-mentioned structure, the liquid cooling subassembly in this battery package occupies that box 200 inner space is little, is favorable to the optimization of box 1, and the security is high.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship based on what is shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. A liquid-cooled battery box body is characterized by comprising a box body and a box cover, wherein a containing groove with an opening at one end is formed in the box body and used for containing a battery module and a battery management system, the box cover seals a notch of the containing groove, a bottom plate is arranged at the bottom of the containing groove and comprises a first plate section, a second plate section and a third plate section which are sequentially connected, the first plate section is parallel to the third plate section, the third plate section is positioned above the first plate section, the second plate section is obliquely arranged between the first plate section and the third plate section, the battery module is placed on the first plate section, the battery management system is placed on the third plate section, cooling liquid flow channels are formed in the first plate section and the third plate section, and the cooling liquid flow channels are used for circulating cooling liquid, and a circulation channel is arranged in the third plate section and is respectively communicated with the cooling liquid flow passages of the first plate section and the second plate section.

2. The liquid-cooled battery box of claim 1, wherein the second plate segment slopes downwardly from the third plate segment toward the first plate segment.

3. The liquid-cooled battery box of claim 1, wherein an end of the third plate segment adjacent to the second plate segment is provided with an avoiding hole communicating with an interior and an exterior of the receiving groove.

4. The liquid-cooled battery box of claim 1, wherein the third plate segment is convexly provided with an inlet connector and an outlet connector, both of which are located on the same side of the box.

5. The liquid-cooled battery box of claim 4, wherein the inlet connector and the outlet connector are spaced apart along a width direction of the box, the coolant channel of the third plate section is provided with a first partition plate, the first partition plate is parallel to a length direction of the box, the first partition plate partitions the coolant channel of the third plate section into an inlet channel and an outlet channel, the inlet connector is communicated with the inlet channel, and the outlet connector is communicated with the outlet channel.

6. The liquid-cooled battery box of claim 4, wherein the inlet connector and the outlet connector are integrally formed with the third plate segment.

7. The liquid-cooled battery box of claim 5, wherein two flow channels are disposed in the second plate, the two flow channels are spaced apart along the width of the box, one end of one of the flow channels remote from the first plate is connected to the inlet channel, and the other end of the flow channel remote from the first plate is connected to the outlet channel.

8. The liquid-cooled battery box of claim 5, wherein the coolant flow channels of the first plate section have third partitions disposed therein, the third partitions being parallel to the length of the box, all of the third partitions being spaced apart along the width of the box to divide the coolant flow channels of the first plate section into a plurality of flow channel sub-sections, adjacent ones of the flow channel sub-sections being interconnected.

9. The liquid-cooled battery box of claim 1, wherein the bottom plate is comprised of a first plate and a second plate, wherein one side of the first plate is recessed with a first groove, a second groove, and a third groove, respectively, the notches of the first groove, the second groove, and the third groove all face away from the notch of the receiving groove, the second plate segment blocks the notches of the first groove, the second groove, and the third groove, the coolant flow channel is formed between the bottom of the first groove and the second plate and between the bottom of the third groove and the second plate, and the flow channel is formed between the bottom of the second groove and the second plate.

10. A battery pack, characterized in that it comprises a cold liquid battery case according to any one of claims 1 to 9.