Power battery and engineering mechanical equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a power battery and engineering mechanical equipment, the power battery comprises a heat management module and a plurality of battery modules, the heat management module comprises a bottom liquid cooling plate and a bottom soaking plate, a first embedding groove is concavely formed in the upper surface of the bottom liquid cooling plate, and a second embedding groove is formed in the lower surface of the bottom soaking plate; a first cooling flow channel is concavely formed in the bottom wall of the first embedding groove, and the bottom soaking plate is embedded in the first embedding groove and covers the first cooling flow channel; and the plurality of battery modules are arranged on the bottom soaking plate. When the engineering mechanical equipment works, the power battery supplies power to the engineering mechanical equipment, and in order to enable the performance of the power battery to be optimal, the battery module needs to be in a proper temperature range, and the temperature of the battery module is adjusted by the bottom liquid cooling plate through the bottom soaking plate; therefore, the heat management module of the power battery can realize uniform heat dissipation and heating of the battery module, and the performance of the power battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to power battery and engineering machinery equipment. BACKGROUND

[0002] Power battery is the power supply that provides power source for tool, and is mostly referred to as the battery that provides power for electric engineering machinery, electric car, electric train, electric bicycle, golf cart.Power battery is the core component of new energy vehicle, and is the important direction of future energy transformation.

[0003] In electric engineering machinery, the electric quantity of power battery is big, and the volume is big, in electric engineering machinery work, power battery can produce a large amount of heat, in the prior art, the heat management of power battery usually uses liquid cooling plate to cool down alone, but, due to the size of the power battery of engineering machinery is larger, therefore, the size of liquid cooling plate is also larger, and further lead to the too long cooling liquid flow channel in liquid cooling plate, cooling liquid flow is uneven, lead to the large temperature difference on the surface of liquid cooling plate, affect the uniformity of battery module heat dissipation and heating, affect the performance of power battery.

[0004] Therefore, power battery and engineering machinery equipment are needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing power battery and engineering machinery equipment to solve the problem that in the related art, due to the size of the power battery of engineering machinery is larger, therefore, the size of liquid cooling plate is also larger, and further lead to the too long cooling liquid flow channel in liquid cooling plate, cooling liquid flow is uneven, lead to the large temperature difference on the surface of liquid cooling plate, affect the uniformity of battery module heat dissipation and heating.

[0006] On the one hand, the utility model provides power battery, and the power battery comprises:

[0007] The heat management module comprises a bottom liquid cooling plate and a bottom heat spreader, the upper surface of the bottom liquid cooling plate is recessed with a first embedding groove, the bottom wall of the first embedding groove is recessed with a first cooling flow channel, and the bottom heat spreader is embedded in the first embedding groove and covers the first cooling flow channel.

[0008] A plurality of battery modules are arranged on the bottom heat spreader.

[0009] As a preferred technical scheme of the power battery, a heat-conducting sealant layer is arranged between the bottom heat spreader and the bottom wall of the first embedding groove.

[0010] As a preferred technical scheme of the power battery, the bottom liquid cooling plate comprises an inlet joint and an outlet joint.

[0011] The first cooling flow channel comprises a plurality of sub-flow channels, inlet openings of the plurality of sub-flow channels being in communication with the liquid inlet connector, and outlet openings of the plurality of sub-flow channels being in communication with the liquid outlet connector.

[0012] As a preferred technical solution of the power battery, the thermal management module further comprises a plurality of side cooling plate groups, the plurality of battery modules are arranged in sequence along a first direction, and one side cooling plate group is arranged between each adjacent two battery modules.

[0013] As a preferred technical solution of the power battery, the side cooling plate group comprises a middle liquid cooling plate and two side heat conduction plates, along the first direction, the two side heat conduction plates are respectively arranged on the two sides of the middle liquid cooling plate, and the two side heat conduction plates are respectively attached to the corresponding two battery modules.

[0014] As a preferred technical solution of the power battery, the middle liquid cooling plate is recessed with a second embedding groove on each opposite face along the first direction, a bottom wall of the second embedding groove is recessed with a second cooling flow channel, the two side heat conduction plates are respectively embedded in the two second embedding grooves, and the two side heat conduction plates respectively cover the second cooling flow channels in the two second embedding grooves.

[0015] As a preferred technical solution of the power battery, the thermal management module further comprises two edge cooling plate groups, the plurality of battery modules are arranged in sequence along a first direction, along the first direction, the two edge cooling plate groups are respectively arranged on the two sides of the plurality of battery modules, and the two edge cooling plate groups are respectively attached to the corresponding two battery modules.

[0016] As a preferred technical solution of the power battery, the edge cooling plate group comprises an edge liquid cooling plate and an edge heat conduction plate, one side of the edge heat conduction plate is attached to the corresponding battery module, and the other side of the edge heat conduction plate is arranged on the edge liquid cooling plate.

[0017] As a preferred technical solution of the power battery, the edge liquid cooling plate is recessed with a third embedding groove on the side opposite to the edge heat conduction plate, a bottom wall of the third embedding groove is recessed with a third cooling flow channel, and the edge heat conduction plate is embedded in the third embedding groove and covers the third cooling flow channel.

[0018] In another aspect, the utility model provides engineering machinery equipment, including power battery in any scheme above.

[0019] The utility model discloses the beneficial effects are:

[0020] The utility model provides power battery and engineering machinery equipment, this power battery includes heat management module and a plurality of battery module, heat management module includes bottom liquid cooling plate and bottom hot plate, the upper surface of bottom liquid cooling plate is recessed with first embedding groove, the bottom wall of first embedding groove is recessed with first cooling flow channel, bottom hot plate is embedded in first embedding groove and covers first cooling flow channel, a plurality of battery module sets up on bottom hot plate. When engineering machinery equipment works, power battery supplies power to engineering machinery equipment, at this moment, a plurality of battery module will produce corresponding heat, after heat is transferred to bottom hot plate, the liquid in bottom hot plate evaporates into steam after being heated, steam expands rapidly because of absorbing heat, moves from high pressure area to low pressure area, diffuses rapidly to the side of bottom hot plate far from battery module. Because this side is pasted with bottom liquid cooling plate, so bottom liquid cooling plate absorbs heat, finally realizes the even heat dissipation of a plurality of battery module, when the outside environment is too cold, needs to heat a plurality of battery module, bottom liquid cooling plate passes in the cooling liquid after heating, after heat is transferred to bottom hot plate, the liquid in bottom hot plate evaporates into steam after being heated, steam expands rapidly because of absorbing heat, moves from high pressure area to low pressure area, diffuses rapidly to the side of bottom hot plate close to battery module. Because this side is pasted with battery module, so battery module absorbs heat, finally realizes the even heating of a plurality of battery module. The heat management module of this power battery can realize the even heat dissipation and heating of battery module, and further improves the performance of power battery. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural schematic diagram of power battery in the utility model embodiment;

[0022] Figure 2 It is the assembly schematic diagram of bottom liquid cooling plate and bottom hot plate in the utility model embodiment;

[0023] Figure 3 It is the explosion schematic diagram of bottom liquid cooling plate and bottom hot plate in the utility model embodiment;

[0024] Figure 4 It is the explosion schematic diagram of side cooling plate group in the utility model embodiment;

[0025] Figure 5 It is the explosion schematic diagram of side cooling plate group in the utility model embodiment.

[0026] In the drawing:

[0027] 11, bottom liquid cooling plate; 111, first embedding groove; 112, first cooling flow channel; 113, liquid inlet connector; 114, liquid outlet connector; 12, bottom vapor chamber; 13, side cooling plate group; 131, middle liquid cooling plate; 1311, second embedding groove; 1312, second cooling flow channel; 132, side vapor chamber; 14, edge cooling plate group; 141, edge liquid cooling plate; 1411, third embedding groove; 1412, third cooling flow channel; 142, edge vapor chamber;

[0028] 2. The battery module. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "upper" and "upper surface" of the first feature relative to the second feature include the vertical direction of the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature relative to the second feature include the vertical direction of the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] like Figures 1-5 As shown, this embodiment provides a power battery, which includes a thermal management module and multiple battery modules 2. The thermal management module includes a bottom liquid cooling plate 11 and a bottom heat spreader 12. The bottom heat spreader 12 is disposed above the bottom liquid cooling plate 11, and the bottom liquid cooling plate 11 and the bottom heat spreader 12 are fixedly disposed relative to each other. The multiple battery modules 2 are disposed on the bottom heat spreader 12. When the construction machinery is working, the power battery supplies power to the construction machinery. At this time, the multiple battery modules 2 will generate corresponding heat. After the heat is transferred to the bottom heat spreader 12, the liquid in the bottom heat spreader 12 evaporates into steam after being heated. The steam expands rapidly due to absorbing heat and moves from the high-pressure area to the low-pressure area, quickly diffusing to the side of the bottom heat spreader 12 away from the battery modules 2. Because this side is in contact with the bottom liquid cooling plate 11, the bottom liquid cooling plate 11 absorbs heat, ultimately achieving uniform heat dissipation for multiple battery modules 2. When the external environment is too cold and heating of multiple battery modules 2 is required, heated coolant is introduced into the bottom liquid cooling plate 11. After the heat is transferred to the bottom heat spreader 12, the liquid in the bottom heat spreader 12 evaporates into steam. The steam expands rapidly due to absorbing heat and moves from the high-pressure area to the low-pressure area, quickly diffusing to the side of the bottom heat spreader 12 closest to the battery modules 2. Because this side is in contact with the battery modules 2, the battery modules 2 absorb heat, ultimately achieving uniform heating of multiple battery modules 2. This power battery thermal management module can achieve uniform heat dissipation and heating of the battery modules 2, thereby improving the performance of the power battery.

[0034] The structure and working principle of the bottom heat spreader 12 are existing technologies and will not be described in detail here.

[0035] Optionally, the bottom liquid cooling plate 11 is concave with a first embedded groove 111 on the surface opposite to the bottom vapor chamber 12, the bottom wall of the first embedded groove 111 is concave with a first cooling flow channel 112, and the bottom vapor chamber 12 is embedded in the first embedded groove 111 and covers the first cooling flow channel 112. In this embodiment, the bottom vapor chamber 12 is embedded in the first embedded groove 111, and the first cooling flow channel 112 is covered, so that the first cooling flow channel 112 forms a pipeline structure, and the cooling liquid can flow in the first cooling flow channel 112, thereby taking away the heat on the bottom vapor chamber 12 or providing heat for the bottom vapor chamber 12. Compared with covering the heat conduction plate in the first embedded groove 111 and then arranging the bottom vapor chamber 12 on the heat conduction plate, this arrangement can reduce the heat transfer path, thereby reducing heat loss, on the one hand, and can reduce the stacking thickness of the bottom liquid cooling plate 11 and the bottom vapor chamber 12, on the other hand, and can reduce the manufacturing cost of the bottom liquid cooling plate 11.

[0036] Optionally, a heat-conducting sealing adhesive layer is arranged between the bottom vapor chamber 12 and the bottom wall of the first embedded groove 111, which can prevent the cooling liquid from leaking out of the gap between the bottom vapor chamber 12 and the inner wall of the first embedded groove 111, and facilitate heat transfer between the bottom vapor chamber 12 and the inner wall of the first embedded groove 111.

[0037] Optionally, the bottom liquid cooling plate 11 comprises an inlet joint 113 and an outlet joint 114; the first cooling flow channel 112 comprises a plurality of sub-flow channels, the inlet of the plurality of sub-flow channels communicates with the inlet joint 113, and the outlet of the plurality of sub-flow channels communicates with the outlet joint 114. In this embodiment, since the size of the power battery arranged on the engineering machinery device is large, the size of the bottom liquid cooling plate 11 is also large, and if the first cooling flow channel 112 only comprises one sub-flow channel, this arrangement can cause the flow resistance of the bottom liquid cooling plate 11 to be relatively large, and on the other hand, the cooling and heating effects of the bottom liquid cooling plate 11 are not uniform, which affects the performance of the power battery. Therefore, the first cooling flow channel 112 of the present application comprises a plurality of sub-flow channels, and the plurality of sub-flow channels are connected in parallel, which can reduce the flow resistance in the sub-flow channels, and on the other hand, improve the uniformity of the cooling and heating of the bottom liquid cooling plate 11.

[0038] Optionally, the thermal management module further comprises a plurality of side cooling plate groups 13, and the plurality of battery modules 2 are arranged in sequence along the first direction, and one side cooling plate group 13 is arranged between each adjacent two battery modules 2. In this embodiment, in order to further improve the thermal management capability of the power battery, one side cooling plate group 13 is arranged between each adjacent two battery modules 2 to take away the heat at the side wall of the battery module 2 or to warm the side wall of the battery module 2.

[0039] For the specific structure of the side cooling plate group 13, optionally, the side cooling plate group 13 comprises an intermediate liquid cooling plate 131 and two side heat spreading plates 132, and the two side heat spreading plates 132 are respectively arranged on the two sides of the intermediate liquid cooling plate 131 along the first direction, and the two side heat spreading plates 132 are respectively attached to the corresponding two battery modules 2. In this embodiment, the two side heat spreading plates 132 are respectively arranged on the two sides of the intermediate liquid cooling plate 131, which can overcome the defect of temperature unevenness of each part of the intermediate liquid cooling plate 131, and further improve the uniformity of temperature control of the side wall of the battery module 2. For the structure and working principle of the side heat spreading plate 132, it is prior art, which will not be described here.

[0040] Optionally, the two opposite faces of the intermediate liquid cooling plate 131 along the first direction are respectively concavely provided with a second embedding groove 1311, the bottom wall of the second embedding groove 1311 is concavely provided with a second cooling flow channel 1312, and the two side heat spreading plates 132 are respectively embedded in the two second embedding grooves 1311, and the two side heat spreading plates 132 respectively cover the second cooling flow channels 1312 in the two second embedding grooves 1311. In this embodiment, the side heat spreading plate 132 is embedded in the second embedding groove 1311, and the second cooling flow channel 1312 is covered, so that the second cooling flow channel 1312 forms a pipeline structure, and the cooling liquid can flow in the second cooling flow channel 1312, thereby taking away the heat on the side heat spreading plate 132 or providing heat for the side heat spreading plate 132. Compared with covering a heat conduction plate in the second embedding groove 1311 and then arranging a side heat spreading plate 132 on the heat conduction plate, this arrangement can reduce the heat transfer path on the one hand, thereby reducing heat loss, on the other hand, it can reduce the stacking thickness of the intermediate liquid cooling plate 131 and the two side heat spreading plates 132, and on the other hand, it can reduce the manufacturing cost of the intermediate liquid cooling plate 131.

[0041] Optionally, a heat-conducting sealing adhesive layer is arranged between the side heat spreading plate 132 and the bottom wall of the second embedding groove 1311, which can prevent the cooling liquid from leaking out of the gap between the side heat spreading plate 132 and the inner wall of the second embedding groove 1311, and facilitate heat transfer between the side heat spreading plate 132 and the inner wall of the second embedding groove 1311.

[0042] Optionally, the thermal management module further comprises two edge cooling plate groups 14, and a plurality of battery modules 2 are arranged in sequence along the first direction, and the two edge cooling plate groups 14 are respectively arranged on the two sides of the plurality of battery modules 2 along the first direction, and the two edge cooling plate groups 14 are respectively attached to the corresponding two battery modules 2. In this embodiment, the two edge cooling plate groups 14 are used to regulate the temperature of the side faces of the two battery modules 2 on the two sides, and the two edge cooling plate groups 14 and the plurality of side cooling plate groups 13 work cooperatively, thereby regulating the temperature of the two side walls of each battery module 2 along the first direction.

[0043] Optionally, the edge cooling plate set 14 comprises an edge liquid cooling plate 141 and an edge soaking plate 142, one side of the edge soaking plate 142 is attached to the corresponding battery module 2, and the other side of the edge soaking plate 142 is arranged on the edge liquid cooling plate 141. In this embodiment, one side of the edge soaking plate 142 is attached to the corresponding battery module 2, and the other side of the edge soaking plate 142 is arranged on the edge liquid cooling plate 141. This arrangement can overcome the defect of uneven temperature of each part of the edge liquid cooling plate 141 itself, thereby improving the uniformity of the temperature control of the side wall of the battery module 2. The structure and working principle of the edge soaking plate 142 are prior art, and will not be described here.

[0044] Optionally, the side opposite to the edge liquid cooling plate 141 and the edge soaking plate 142 is recessed with a third embedding groove 1411, the bottom wall of the third embedding groove 1411 is recessed with a third cooling flow channel 1412, and the edge soaking plate 142 is embedded in the third embedding groove 1411 and covers the third cooling flow channel 1412. In this embodiment, the edge soaking plate 142 is embedded in the third embedding groove 1411, thereby covering the third cooling flow channel 1412, so that the third cooling flow channel 1412 forms a pipeline structure, and the cooling liquid can flow in the third cooling flow channel 1412, thereby taking away the heat on the edge soaking plate 142 or providing heat for the edge soaking plate 142. Compared with covering a heat conduction plate in the third embedding groove 1411 and then arranging the edge soaking plate 142 on the heat conduction plate, this arrangement can reduce the heat transfer path, thereby reducing heat loss, reduce the stacking thickness of the edge liquid cooling plate 141 and the edge soaking plate 142, and reduce the manufacturing cost of the edge liquid cooling plate 141.

[0045] Optionally, a heat-conducting sealing adhesive layer is arranged between the edge soaking plate 142 and the bottom wall of the third embedding groove 1411. This arrangement can prevent the cooling liquid from leaking out of the gap between the edge soaking plate 142 and the inner wall of the third embedding groove 1411, and facilitate heat transfer between the edge soaking plate 142 and the inner wall of the third embedding groove 1411.

[0046] The embodiment also provides an engineering mechanical device comprising the power battery in the above-mentioned scheme. Specifically, the engineering mechanical device can be a mine car, a crane, a shovel truck or the like.

[0047] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary or possible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A power cell, characterized by The application relates to a thermal management module for a battery pack. The thermal management module comprises a bottom liquid cooling plate (11) and a bottom uniform heating plate (12), the upper surface of the bottom liquid cooling plate (11) is concave and provided with a first embedding groove (111), the bottom wall of the first embedding groove (111) is concave and provided with a first cooling flow channel (112), and the bottom uniform heating plate (12) is embedded in the first embedding groove (111) and covers the first cooling flow channel (112). A plurality of battery modules (2) are arranged on the bottom uniform heating plate (12).

2. The power cell of claim 1, wherein, A heat-conducting sealing adhesive layer is arranged between the bottom uniform heating plate (12) and the bottom wall of the first embedding groove (111).

3. The power cell of claim 1, wherein, The bottom liquid cooling plate (11) comprises an inlet joint (113) and an outlet joint (114). The first cooling flow channel (112) comprises a plurality of sub-flow channels, the inlet of each sub-flow channel is communicated with the inlet joint (113), and the outlet of each sub-flow channel is communicated with the outlet joint (114).

4. The power cell of claim 1, wherein, The thermal management module further comprises a plurality of side cooling plate groups (13), the plurality of battery modules (2) are arranged in sequence along a first direction, and one side cooling plate group (13) is arranged between each two adjacent battery modules (2).

5. The power cell of claim 4, wherein, The side cooling plate group (13) comprises a middle liquid cooling plate (131) and two side uniform heating plates (132), along the first direction, the two side uniform heating plates (132) are arranged on the two sides of the middle liquid cooling plate (131) respectively, and the two side uniform heating plates (132) are attached to the corresponding two battery modules (2) respectively.

6. The power cell of claim 5, wherein, The opposite two surfaces of the middle liquid cooling plate (131) along the first direction are concave and provided with second embedding grooves (1311) respectively, the bottom wall of each second embedding groove (1311) is concave and provided with a second cooling flow channel (1312), and the two side uniform heating plates (132) are embedded in the two second embedding grooves (1311) respectively, and the two side uniform heating plates (132) cover the second cooling flow channels (1312) in the two second embedding grooves (1311) respectively.

7. The power cell of claim 1, wherein, The thermal management module further comprises two edge cooling plate groups (14), the plurality of battery modules (2) are arranged in sequence along a first direction, along the first direction, the two edge cooling plate groups (14) are arranged on the two sides of the plurality of battery modules (2) respectively, and the two edge cooling plate groups (14) are attached to the corresponding two battery modules (2) respectively.

8. The power cell of claim 7, wherein, The edge cooling plate group (14) comprises an edge liquid cooling plate (141) and an edge uniform heating plate (142), one side of the edge uniform heating plate (142) is attached to the corresponding battery module (2), and the other side of the edge uniform heating plate (142) is arranged on the edge liquid cooling plate (141).

9. The power cell of claim 8, wherein, The side opposite to the edge uniform heating plate (142) of the edge liquid cooling plate (141) is concave and provided with a third embedding groove (1411), the bottom wall of the third embedding groove (1411) is concave and provided with a third cooling flow channel (1412), and the edge uniform heating plate (142) is embedded in the third embedding groove (1411) and covers the third cooling flow channel (1412).

10. Construction equipment, characterized in that A power battery comprising any one of claims 1-9.

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