Battery pack and electric equipment

Abstract

The utility model relates to the technical field of power batteries, in particular to a battery pack which is used for being installed on a vehicle body, the battery pack comprises a box body, a cold plate and a connector assembly, the box body comprises a frame body and a containing space defined by the frame body, and the containing space comprises a battery bin for containing a battery module and a first bin arranged on the opposite side of the battery bin; the cold plate is arranged at the bottom of the box body, the connector assembly is arranged in the first bin and comprises a connector and a piping, the piping is connected with the cold plate, the cold plate comprises a water inlet and a water outlet, and the water inlet and the water outlet are arranged in the length direction of the vehicle body. The battery pack disclosed by the utility model can reduce the flow resistance and save the cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, specifically provide a battery pack and electric equipment. BACKGROUND

[0002] With the development of society, in order to reduce the pollution of automobile exhaust to atmosphere, at present, new energy vehicles such as lithium battery obtain vigorous promotion, as the power source of new energy vehicle, vehicle-mounted battery will be a large amount of heat dissipation when working, usually a set of special water cooling pipeline is used in battery pack to control the temperature of battery, with the increasing demand of outside new energy vehicle power and endurance mileage, the volume of battery module is also bigger and bigger, so that the water cooling pipeline arrangement condition is higher. In the conventional battery pack cooling system, generally contains water fast change, water pipe, cold plate three main components. The inlet and outlet of cold plate are at the far position on both sides of water fast change, to enhance the temperature consistency of battery pack, the cold plate area flow channel of cooling cell needs to be connected in parallel, so that the flow channel of one side of cold plate is less than the flow channel of the other side, the flow uniformity of left and right sides of cold plate is poor, or the flow resistance of the other side is increased, and the flow channel right angle turn also causes the flow resistance to increase.

[0003] Therefore, there is a need in the art for a new technical solution to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at solving above-mentioned technical problem, provides a novel battery pack that can reduce flow resistance and save cost.

[0005] The utility model provides a battery pack for installing to the vehicle body, comprising:

[0006] The box body comprises a frame body and a receiving space formed by the frame body, the receiving space comprises a battery compartment for accommodating a battery module and a first compartment arranged on the opposite side of the battery compartment.

[0007] The cold plate is arranged at the bottom of the box body.

[0008] The joint assembly is arranged in the first compartment, and the joint assembly comprises a joint and a pipe, and the pipe is connected with the cold plate.

[0009] The cold plate comprises an inlet and an outlet, and the inlet and the outlet are arranged along the length direction of the vehicle body.

[0010] In the technical scheme, the joint assembly is arranged in the first compartment and communicates with the cold plate through the pipe, the water inlet pipe and the quick plug joint are cancelled, the joint assembly is directly connected with the cold plate, and the joint assembly and the cold plate are connected through the water pipe and the quick plug joint, so that the number of parts is reduced, the volume is reduced, and the cost is reduced.

[0011] In the preferred technical scheme of the battery pack, the joint includes a main body, an insert arranged on the first side of the main body, and a connecting pipe arranged on the second side of the main body, and the main body is arranged in the first compartment.

[0012] In the technical scheme, the joint is arranged in the first compartment, which can facilitate assembly with the vehicle end assembly and make full use of the space of the box, so that the joint assembly and the battery module do not affect each other during assembly.

[0013] In the preferred technical scheme of the battery pack, the insert is clamped with the pipe, and the joint is in communication with the pipe.

[0014] In the technical scheme, the insert is clamped with the pipe, so that the joint and the pipe are convenient to disassemble and reliable in connection.

[0015] In the preferred technical scheme of the battery pack, the cold plate includes an upper cover plate and a lower cover plate, the lower cover plate is provided with a groove or a protrusion, the upper cover plate is sealingly connected with the lower cover plate, and a flow channel is arranged between the upper cover plate and the lower cover plate.

[0016] In the technical scheme, the groove or the protrusion arranged on the lower cover plate can not only increase the strength of the lower cover plate, but also define a flow channel between the upper cover plate and the lower cover plate for the cooling liquid to flow through, and the sealing connection between the upper cover plate and the lower cover plate through welding can save the process, is convenient to operate, saves materials while ensuring the function of the cold plate, and reduces the cost.

[0017] In the preferred technical scheme of the battery pack, the flow channel is symmetrically arranged along the axis line connecting the water inlet and the water outlet.

[0018] In the technical scheme, the flow channel is symmetrically arranged along the axis line connecting the water inlet and the water outlet, so that the cooling liquid flows through the left and right sides with the same distance, the flow resistance is consistent, the flow rate is consistent, and therefore the temperature uniformity of the battery module is good.

[0019] In the preferred technical scheme of the battery pack, the flow channel comprises a main flow and a branch flow, and the extension direction of the branch flow is parallel to the axial line direction of the water inlet and the water outlet.

[0020] In the case of using the above technical scheme, the cooling liquid flows into the branch flow through the main flow, and the extension direction of the branch flow is parallel to the axial line direction, so that the cooling liquid flowing through the water inlet and the water outlet has less bending, thereby reducing the flow resistance, and the temperature uniformity of the battery module is better.

[0021] In the preferred technical scheme of the battery pack, the length of the flow channel parallel to the axial line is greater than the length of the flow channel perpendicular to the axial line.

[0022] In the case of using the above technical scheme, the distance parallel to the axial line is long, the cooling liquid has less bending and a longer straight path in the flow channel, which can further reduce the flow resistance, and the water inlet flow channel and the water outlet flow channel are both the same, so that the cold plate has a better cooling effect.

[0023] In the preferred technical scheme of the battery pack, the flow channel comprises a water inlet flow channel and a water outlet flow channel, the water inlet flow channel is close to the first compartment, and the water outlet flow channel is away from the first compartment.

[0024] In the case of using the above technical scheme, the cooling liquid in the water inlet flow channel enters from the water inlet, the cooling liquid in the cold plate flows out from the water outlet, the water inlet flow channel is located on the outer side, and the water outlet flow channel is located in the middle of the water inlet flow channel, so that the area of the cooling flow channel is increased, the cooling effect is improved, and in addition, the proportion of the water inlet flow channel is large, thereby further improving the cooling effect.

[0025] In the preferred technical scheme of the battery pack, the water inlet is close to the first compartment, and the water outlet is away from the first compartment.

[0026] In the case of using the above technical scheme, the water inlet is on the outer side of the water outlet, so that the water inlet flow channel is arranged on the outer side of the cold plate, and the water outlet flow channel is arranged on the inner side of the cold plate, so that the water inlet flow channel has a large area and is relatively dispersed, which can maximize the cooling of the battery module, and the number of battery cells in the middle water outlet flow channel is small or none, having a good cooling effect.

[0027] In a second aspect, the utility model provides a kind of electric equipment, comprising the battery pack of first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0028] The preferred embodiments of the utility model are described below with reference to the drawings, and the drawings are as follows:

[0029] Figure 1 It is the structure diagram of the box and cold plate of the utility model;

[0030] Figure 2 is the installation structure schematic diagram of the quick change assembly of the utility model;

[0031] Figure 3 is the structure schematic diagram of the joint assembly and the cold plate of the utility model;

[0032] Figure 4 is the overhead schematic diagram of the joint assembly and the cold plate of the utility model;

[0033] Figure 5 is the overhead schematic diagram of the cold plate of the utility model.

[0034] Reference signs:

[0035] 1, box body;11, frame body;12, battery compartment;13, first compartment;

[0036] 2, cold plate;21, upper cover plate;22, lower cover plate;23, water inlet;24, water outlet;25, dry flow;26, branch flow;27, water inlet flow channel;28, water outlet flow channel;

[0037] 3, joint assembly;31, pipe;32, joint;

[0038] 4, quick change assembly;41, plug-in pipe;42, connecting pipeline;43, floating piece;

[0039] L, axis center line;W, vehicle body length direction. DETAILED DESCRIPTION

[0040] The preferred embodiments of the utility model are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.

[0041] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the term "connection", "arrangement", "installation" should be broad understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0043] As Figures 1 to 5 Indicated, in the first aspect battery pack of the utility model, for installing to the vehicle body, the battery pack includes box 1, cold plate 2 and joint assembly 3, box 1 includes frame body 11 and the receiving space formed by frame body 11 surrounding, receiving space includes the battery compartment 12 of accommodating battery module and the first compartment 13 arranged at the opposite side of battery compartment 12, cold plate 2 is arranged at the bottom of box 1, joint assembly 3 is arranged in the first compartment 13, joint assembly 3 includes joint 32 and pipe 31, pipe 31 is connected with cold plate 2, cold plate 2 includes water inlet 23 and water outlet 24, water inlet 23 and water outlet 24 are arranged along the length direction W of vehicle body.

[0044] The joint assembly 3 of the utility model is arranged in the first compartment 13 and pipe 31 is communicated with cold plate 2, pipe 31 is directly welded with water inlet 23 and water outlet 24, cancels the inlet and outlet water pipe and quick plug connector, so that joint assembly 3 is directly connected with cold plate 2, joint assembly 3 and cold plate 2 do not need to be connected through water pipe and quick plug connector, not only reduces the number of parts used, reduces the volume, reduces the cost. Water inlet 23 and water outlet 24 of cold plate 2 are arranged along the length direction W of vehicle body, so that the cooling liquid flow path of cold plate 2 can be parallel, the flow resistance can be reduced, the temperature of cooling liquid is consistent on the same cross section in the vertical flow direction, and the consistency of battery cell is ensured.

[0045] As Figures 2 to 3As shown, the joint 32 includes a main body 320, an insert (not shown) arranged on the first side of the main body 320, and a connecting pipe 321 arranged on the second side of the main body 320. The main body 320 is installed in the first bin 13. The joint 32 is installed in the first bin 13, which not only facilitates assembly with the vehicle end assembly, but also makes full use of the space of the box body 1, so that the joint assembly 3 and the battery module do not affect each other during assembly. The insert is clamped with the pipe 31, and the joint 32 is in communication with the pipe 31, so that the joint 32 and the pipe 31 are easy to disassemble and reliable in connection. The battery pack also includes a quick-change assembly 4 connected with the joint 32. The quick-change assembly 4 is connected with the vehicle body and includes a plug-in pipe 41 plugged with the joint 32, a connecting pipe 42 away from the plug-in pipe 41, and a floating member 43 arranged around the quick-change assembly 4. In this embodiment, the connecting pipe 42 is arranged at a position corresponding to the joint assembly 3. The quick-change assembly 4 is plugged with the joint assembly 3 and realizes the communication of the cooling liquid. The connecting pipe 42 is two, and the floating member 43 is four.

[0046] As shown in Figures 3 to 5 , the cold plate 2 includes an upper cover plate 21 and a lower cover plate 22. The lower cover plate 22 is provided with a recess or a protrusion. The upper cover plate 21 is sealingly connected with the lower cover plate 22, and a flow channel is arranged between the two. The recess or protrusion arranged on the lower cover plate 22 not only increases the strength of the lower cover plate 22, but also defines a flow channel with the upper cover plate 21 for the flow of cooling liquid. The sealing connection between the upper cover plate 21 and the lower cover plate 22 not only saves the process and is easy to operate, but also saves materials and reduces costs while ensuring the function of the cold plate.

[0047] Referring to Figure 5 , the flow channel is symmetrically arranged along the axis L of the water inlet 23 and the water outlet 24. The axis L is located at one end of the length direction W of the vehicle body and is the symmetry axis of the cold plate. The flow channel is symmetrically arranged along the axis L of the water inlet 23 and the water outlet 24. During the flow of the cooling liquid, the cooling liquid flows through the left and right sides with the same distance, so that the flow resistance is consistent, thereby making the flow consistent, and the temperature uniformity of the battery module is also good.

[0048] Referring to Figure 4 , the flow channel includes a main flow 25 and a branch flow 26. The extension direction of the branch flow 26 is parallel to the axis L direction of the water inlet and the water outlet. The cooling liquid flows into the branch flow 26 through the main flow 25. The extension direction of the branch flow 26 is parallel to the axis L direction, which can make the cooling liquid flowing through the water inlet 23 and the water outlet 24 have less bending, thereby reducing the flow resistance and making the temperature uniformity of the battery module better. The length of the flow channel parallel to the axis L is greater than the length of the flow channel perpendicular to the axis L. The distance parallel to the axis L is long, the cooling liquid has less bending in the flow channel and has a longer straight path, which can further reduce the flow resistance and make the cold plate have better cooling effect.

[0049] Referring to Figure 5 The flow channel includes an inlet flow channel 27 and an outlet flow channel 28, the inlet flow channel 27 is close to the first bin 13 and the outlet flow channel 28 is away from the first bin 13, the cooling liquid in the inlet flow channel 27 enters from the water inlet 23, the cooling liquid in the cold plate 2 flows out from the water outlet 24, the inlet flow channel 27 is located at the outer side, the outlet flow channel 28 is located in the middle of the inlet flow channel 27, so that the area of the cooling flow channel can be increased, and the cooling effect can be improved, in addition, the proportion of the inlet flow channel 27 can be large, and the cooling effect can be further improved. The water inlet 23 is close to the first bin 13 and the water outlet 24 is away from the first bin 13, and the water inlet 23 is on the outer side of the water outlet 24, so that the inlet flow channel 27 is arranged on the outer side of the cold plate 2, and the outlet flow channel 28 is arranged on the inner side of the cold plate 2, so that the inlet flow channel 27 has a large area and is relatively dispersed, so that the battery module can be maximally cooled, and the number of the battery cells in the middle outlet flow channel 28 is small or none, and the cooling effect is good.

[0050] In the second aspect, the power equipment comprises the battery pack of the first aspect. The power equipment comprises the battery pack of any of the aspects of the present application, and thus has all the technical effects of the battery pack of any of the aspects of the present application.

[0051] It should be noted that the above preferred embodiments are only used to illustrate the principles of the present application, and are not intended to limit the protection scope of the present application. Those skilled in the art can adjust the above setting mode without departing from the principles of the present application, so that the present application can be applied to more specific application scenarios.

[0052] Of course, the above alternative embodiments can also be used in cross cooperation between the alternative embodiments and between the alternative embodiments and the preferred embodiments, so as to combine new embodiments to be applicable to more specific application scenarios.

[0053] So far, the technical scheme of the present application has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the present application, and the technical schemes after the changes or replacements will fall within the protection scope of the present application.

Claims

1. A battery pack for mounting to a vehicle body, characterized by, The battery pack comprises: a box body comprising a frame and a receiving space formed by the frame, the receiving space comprising a battery compartment for accommodating a battery module and a first compartment arranged on an opposite side of the battery compartment; a cold plate arranged at a bottom of the box body; a joint assembly arranged in the first compartment, the joint assembly comprising a joint and a pipe connected with the cold plate; wherein the cold plate comprises a water inlet and a water outlet, and the water inlet and the water outlet are arranged along a length direction of the vehicle body.

2. The battery pack of claim 1, wherein, The joint comprises a main body, an insert arranged on a first side of the main body, and a connecting pipe arranged on a second side of the main body, and the main body is arranged in the first compartment.

3. The battery pack of claim 2, wherein, The insert is clamped with the pipe, and the joint is in communication with the pipe.

4. The battery pack of claim 1, wherein, The cold plate comprises an upper cover plate and a lower cover plate, the lower cover plate is provided with a groove or a protrusion, the upper cover plate is sealingly connected with the lower cover plate, and a flow channel is arranged between the upper cover plate and the lower cover plate.

5. The battery pack of claim 4, wherein, The flow channel is symmetrically arranged along an axis line of the water inlet and the water outlet.

6. The battery pack of claim 4, wherein, The flow channel comprises a main flow and a branch flow, and an extension direction of the branch flow is parallel to a direction of the axis line of the water inlet and the water outlet.

7. The battery pack of claim 5 or 6, wherein, A length of the flow channel parallel to the axis line is greater than a length of the flow channel perpendicular to the axis line.

8. The battery pack of claim 4, wherein, The flow channel comprises a water inlet flow channel and a water outlet flow channel, the water inlet flow channel is close to the first compartment, and the water outlet flow channel is away from the first compartment.

9. The battery pack of claim 1, wherein, The water inlet is close to the first compartment, and the water outlet is away from the first compartment.

10. An electric device, characterized by The battery pack comprises any one of claims 1-9.

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