Cooling assembly, battery pack and vehicle

Abstract

The utility model discloses a cooling assembly, a battery pack and a vehicle, the cooling assembly comprises a plurality of cooling pipes and a cooling plate, the cooling pipes are arranged on one side of the cooling plate, an accommodating space for accommodating a battery cell module is defined between the cooling pipes and the cooling plate, the plurality of cooling pipes are arranged at intervals in the width direction of the cooling plate, and the battery cell module is arranged in the accommodating space. The cooling pipe extends in the length direction of the cooling plate, one end of the cooling pipe is an inlet allowing a cooling medium to flow in, the other end of the cooling pipe is an outlet allowing the cooling medium to flow out, the cooling plate is provided with a cooling flow channel, a flow channel inlet and a flow channel outlet, the cooling flow channel extends in the length direction of the cooling plate, and the flow channel inlet is communicated with the flow channel outlet. And the flow direction of the cooling medium in the cooling pipe is opposite to that of the cooling medium in the cooling runner. According to the cooling assembly disclosed by the invention, the temperature difference of the battery cells in the same column can be reduced, and the temperature consistency of the battery cells is improved, so that the electrical performance of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack cooling, and specifically relates to a cooling component, a battery pack and a vehicle Background Art

[0002] As power batteries have higher and higher requirements for charging speeds, the charging rates of battery cells have gradually reached new highs. However, under high-rate charging conditions, the battery cell poles are often accompanied by higher heat generation, which will seriously affect the charging performance of the battery cell.

[0003] In order to improve the cooling effect of the battery pole under high-rate charging conditions, in the related art, a cooling tube for cooling the battery pole is set above the battery module, and the cooling tube is connected in parallel with the cooling plate set below the battery module, so that the cooling medium enters the cooling tube and the cooling plate at the same time. However, although the above solution solves the problem of pole cooling, it will cause a large temperature difference between the batteries in the same column of the battery module, reduce the consistency of the battery temperature, and lead to poor electrical performance of the battery pack. Utility Model Content

[0004] The present disclosure aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a cooling assembly to improve the temperature consistency of a battery pack cell, an embodiment of the present disclosure also provides a battery pack with good electrical performance, and an embodiment of the present disclosure also provides a vehicle with good battery pack performance.

[0005] The cooling assembly of the disclosed embodiment includes a plurality of cooling tubes and a cooling plate. The cooling tube is arranged on one side of the cooling plate and defines an accommodation space for accommodating a battery cell module between the cooling tube and the cooling plate. The plurality of cooling tubes are arranged at intervals in the width direction of the cooling plate, and the cooling tubes extend along the length direction of the cooling plate. One end of the cooling tube is an inlet for a cooling medium to flow in, and the other end of the cooling tube is an outlet for a cooling medium to flow out. The cooling plate has a cooling channel, a channel inlet and a channel outlet. The cooling channel extends along the length direction of the cooling plate. The flow direction of the cooling medium in the cooling tube is opposite to the flow direction of the cooling medium in the cooling channel.

[0006] In some embodiments, the outlet of the cooling pipe is communicated with the inlet of the flow channel.

[0007] In some embodiments, the cooling assembly of the present disclosure includes:

[0008] a first header, the first header extending in a width direction of the cooling plate, the first header having a first cooling medium inlet and a first cooling medium outlet, the first cooling medium outlet being in communication with the inlet of the cooling tube; and / or

[0009] The second header extends along the width direction of the cooling plate, and has a second cooling medium inlet and a second cooling medium outlet. The second cooling medium inlet is connected to the outlet of the cooling tube, and the second cooling medium outlet is connected to the flow channel inlet.

[0010] In some embodiments, the number of the first current collector and the number of the second current collector are both multiple and one-to-one corresponding, and two cooling tubes are provided between the first current collector and the corresponding second current collector.

[0011] In some embodiments, there are multiple flow channel inlets, and the multiple flow channel inlets correspond one-to-one to the multiple second collecting pipes. The second cooling medium outlet of the second collecting pipe is connected to the corresponding flow channel inlet through a connecting pipe, and the connecting pipe extends along the thickness direction of the cooling plate.

[0012] In some embodiments, the connecting pipe is a corrugated pipe; and / or at least one end of the connecting pipe is provided with a quick connector.

[0013] In some embodiments, the cooling assembly of the embodiment of the present disclosure also includes a shunt pipe, which extends along the width direction of the cooling plate, and has a third cooling medium inlet and multiple third cooling medium outlets on the tube wall of the shunt pipe. The multiple third cooling medium outlets correspond one-to-one to and are connected with the first cooling medium inlets of the multiple first collecting pipes.

[0014] In some embodiments, an insulating coating is provided on the outer wall surface of the cooling tube.

[0015] The battery pack of the disclosed embodiment includes a cooling assembly and a battery cell module, wherein the cooling assembly is the cooling assembly described in any of the above embodiments; the battery cell module is arranged in the accommodation space between the cooling tube and the cooling plate, the cooling tube is arranged at the top of the battery cell module for cooling the pole of the battery cell, and the cooling plate is arranged at the bottom of the battery cell module.

[0016] The vehicle of the disclosed embodiment is a battery pack as described in any of the above embodiments.

[0017] When assembling the cooling assembly of the embodiment of the present disclosure, the cell module is placed in the accommodation space between the cooling tube and the cooling plate. The cooling tube is arranged at the top of the cell module to cool the pole of the cell, and the cooling plate is arranged at the bottom of the cell module. When the cooling medium flows from the inlet of the cooling tube to the outlet of the cooling tube, the temperature of the cooling medium in the cooling tube gradually increases from the inlet of the cooling tube to the outlet of the cooling tube due to the continuous heat exchange between the cooling medium and the pole. When the cooling medium flows from the inlet of the flow channel to the outlet of the flow channel, the temperature of the cooling medium in the cooling flow channel gradually increases from the inlet of the flow channel to the outlet of the flow channel due to the continuous heat exchange between the cooling medium and the bottom of the cell. Because the flow direction of the cooling medium in the cooling tube is opposite to the flow direction of the cooling medium in the cooling flow channel, the cooling medium with a higher temperature in the cooling tube corresponds to the cooling medium with a lower temperature in the cooling plate and neutralizes, so that the temperature of the cells in the same column in the cell module is always close to or even the same, thereby greatly reducing the temperature difference of the cells in the same column, improving the consistency of the cell temperature, and thus improving the electrical performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the assembly of the cooling component and the battery core module of an embodiment of the utility model.

[0019] Figure 2 It is a schematic structural diagram of a cooling assembly according to an embodiment of the utility model.

[0020] Figure 3 It is a top view of the cooling assembly of the embodiment of the utility model.

[0021] Figure 4 It is a structural schematic diagram of a cooling plate according to an embodiment of the utility model.

[0022] Figure 5 It is a schematic diagram of the connection between the cooling pipe and the first header and the second header in an embodiment of the utility model.

[0023] Figure 6 It is a structural schematic diagram of a connecting pipe according to an embodiment of the utility model.

[0024] Figure 7 It is a schematic diagram of the flow direction of the cooling medium in the cooling pipe and the cooling plate of the embodiment of the utility model.

[0025] Reference numerals:

[0026] 100, cooling assembly; 200, battery cell module; 1, cooling pipe; 2, cooling plate; 201, cooling channel; 202, channel inlet; 203, channel outlet; 3, accommodating space; 4, first collector; 401, first cooling medium inlet; 5, second collector; 501, second cooling medium outlet; 6, connecting pipe; 7, quick connector; 8, shunt pipe. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0028] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 7 As shown, the cooling assembly 100 of the embodiment of the utility model includes a plurality of cooling tubes 1 and a cooling plate 2. The cooling tube 1 is arranged on one side of the cooling plate 2 and defines a receiving space 3 for receiving the battery cell module 200 between the cooling tube 1 and the cooling plate 2. The plurality of cooling tubes 1 are arranged at intervals in the width direction of the cooling plate 2, and the cooling tubes 1 extend along the length direction of the cooling plate 2. One end of the cooling tube 1 is an inlet for the cooling medium to flow in, and the other end of the cooling tube 1 is an outlet for the cooling medium to flow out. The cooling plate 2 has a cooling channel 201, a channel inlet 202 and a channel outlet 203. The cooling channel 201 extends along the length direction of the cooling plate 2. The flow direction of the cooling medium in the cooling tube 1 is opposite to the flow direction of the cooling medium in the cooling channel 201.

[0030] When assembling the cooling assembly 100 of the embodiment of the utility model, the battery cell module 200 is placed in the accommodation space 3 between the cooling tube 1 and the cooling plate 2. The cooling tube 1 is arranged at the top of the battery cell module 200, and the cooling plate 2 is arranged at the bottom of the battery cell module 200. The cooling medium enters the cooling tube 1 from the inlet of the cooling tube 1, exchanges heat with the pole of the battery cell, and flows out through the outlet of the cooling tube 1, thereby cooling the pole of the battery cell. The cooling medium enters the cooling channel 201 from the channel inlet 202, exchanges heat with the bottom of the battery cell, and flows out through the channel outlet 203.

[0031] When the cooling medium flows from the inlet of cooling tube 1 to the outlet of cooling tube 1, the cooling medium and the pole continuously exchange heat, so the temperature of the cooling medium in cooling tube 1 gradually increases from the inlet of cooling tube 1 to the outlet of cooling tube 1. When the cooling medium flows from the flow channel inlet 202 to the flow channel outlet 203, the cooling medium and the bottom of the battery cell continuously exchange heat, so the temperature of the cooling medium in cooling channel 201 gradually increases from the flow channel inlet 202 to the flow channel outlet 203. In addition, because the flow direction of the cooling medium in cooling tube 1 is opposite to the flow direction of the cooling medium in cooling channel 201 (such as Figure 7As shown), therefore, the cooling medium with a higher temperature in the cooling tube 1 corresponds to and neutralizes the cooling medium with a lower temperature in the cooling plate 2, so that the temperatures of the battery cells in the same column of the battery cell module 200 are always close to or even the same, thereby greatly reducing the temperature difference of the battery cells in the same column, improving the consistency of the battery cell temperature, and thus improving the electrical performance of the battery pack.

[0032] In some embodiments, the outlet of the cooling pipe 1 is in communication with the flow channel inlet 202 .

[0033] That is, the cooling pipe 1 is connected in series with the cooling channel 201 of the cooling plate 2, and the cooling pipe 1 and the cooling plate 2 are roughly C-shaped (such as Figure 2 and Figure 7 As shown), and a complete loop is formed. Specifically, the cooling medium first enters the cooling tube 1 to exchange heat with the pole of the battery cell, and then enters the cooling channel 201 of the cooling plate 2 to exchange heat with the bottom of the battery cell. The cooling tube 1 is connected in series with the cooling channel 201 of the cooling plate 2, which not only reduces the flow distribution of the primary cooling medium, making the flow distribution easier to achieve, but also reduces the number of pipes and joints in the reflux part of the cooling tube 1, which is not only conducive to cost saving, but also reduces the space occupied by pipes and joints, and improves the integration of the battery pack.

[0034] In some embodiments, the cooling assembly 100 of the utility model embodiment includes a first header 4, which extends along the width direction of the cooling plate 2, and has a first cooling medium inlet 401 and a first cooling medium outlet, and the first cooling medium outlet is connected to the inlet of the cooling pipe 1.

[0035] Specifically, Figure 2 and Figure 3 As shown, the cooling medium enters the first header 4 through the first cooling medium inlet 401, and the cooling medium entering the first header 4 enters each cooling tube 1 through the first cooling medium outlet. Since there are a large number of cooling tubes 1, the first header 4 is provided to redistribute the cooling medium, which is beneficial to improve the uniformity of the cooling medium distribution.

[0036] In some embodiments, the cooling assembly 100 of the utility model embodiment also includes a second collecting pipe 5, which extends along the width direction of the cooling plate 2, and the second collecting pipe 5 has a second cooling medium inlet and a second cooling medium outlet 501. The second cooling medium inlet is connected to the outlet of the cooling pipe 1, and the second cooling medium outlet 501 is connected to the flow channel inlet 202.

[0037] Specifically, Figure 2 and Figure 3As shown, the cooling medium flowing out of the outlet of each cooling tube 1 enters the second header 5 through the second cooling medium inlet, and the cooling medium entering the second header 5 enters the cooling channel 201 through the second cooling medium outlet 501. Since there are a large number of cooling tubes 1, the cooling medium is collected by setting the second header 5 and then uniformly flows into the cooling channel 201, so that the rate at which the cooling medium enters the cooling channel 201 is relatively stable, which is conducive to improving the continuity and stability of the cooling medium flowing into the cooling channel 201.

[0038] Alternatively, if Figure 4 As shown, the cooling plate 2 is a stamped brazed cold plate, which is composed of a flow channel plate, a flat plate and a joint. The flow channel is stamped on the flow channel plate, and after brazing with the flat plate, a closed cavity, namely the cooling flow channel 201, is formed. The joint is welded to the flat plate as the flow channel inlet 202 and the flow channel outlet 203 of the cooling plate 2, and is later connected with the pipeline to form a complete circuit.

[0039] Optionally, the cooling channel 201 of the cooling plate 2 adopts a straight-in and straight-out design, which can be combined with the battery cell layout to achieve precise cooling. At the same time, the straight-in and straight-out design can reduce the overall flow resistance of the system.

[0040] In some embodiments, the number of the first headers 4 and the number of the second headers 5 are both multiple and one-to-one corresponding, and two cooling tubes 1 are provided between the first headers 4 and the corresponding second headers 5 .

[0041] Specifically, Figures 1 to 3 As shown, the number of the first header 4 and the second header 5 are both six, and the first header 4 and the second header 5 are arranged at intervals in the length direction of the cooling plate 2 and correspond to each other. The two ends of the cooling tube 1 can be connected to the first header 4 and the second header 5 by welding. The first header 4, the second header 5 and the two cooling tubes 1 form a component (such as Figure 5 During installation, one assembly can be installed on a row of cells, so that the two cooling tubes 1 on the assembly are used to cool the positive pole and the negative pole of the row of cells respectively, thereby facilitating the assembly of the cooling tubes 1 and improving the assembly efficiency of the cooling tubes 1.

[0042] In some embodiments, there are multiple flow channel inlets 202, and the multiple flow channel inlets 202 correspond one-to-one to the multiple second collecting pipes 5. The second cooling medium outlet 501 of the second collecting pipe 5 is connected to the corresponding flow channel inlet 202 through the connecting pipe 6, and the connecting pipe 6 extends along the thickness direction of the cooling plate 2.

[0043] like Figure 2 and Figure 7As shown, since the connecting tube 6 extends in the thickness direction of the cooling plate 2, when the two ends of the connecting tube 6 are respectively connected to the second cooling medium outlet 501 and the flow channel inlet 202 of the second collecting tube 5, the connecting tube 6 can limit the distance between the cooling tube 1 and the cooling plate 2, so that the distance between the cooling tube 1 and the cooling plate 2 just accommodates the battery cell module 200, thereby facilitating the compact and reliable assembly of the battery cell module 200, which is beneficial to improving the assembly efficiency of the telecommunication module 200.

[0044] Optionally, the connecting pipe 6 is a corrugated pipe for absorbing installation dimension tolerance, thereby facilitating the assembly of the connecting pipe 6 .

[0045] Optionally, at least one end of the connecting pipe 6 is provided with a quick connector 7, that is, a quick connector 7 can be provided at one end of the connecting pipe 6 or quick connectors 7 are provided at both ends of the connecting pipe 6, so as to improve the connection efficiency between the connecting pipe 6 and the second medium outlet and the flow channel inlet 202 of the second collecting pipe 5.

[0046] In some embodiments, the cooling assembly 100 of the utility model embodiment also includes a shunt pipe 8, which extends along the width direction of the cooling plate 2. The shunt pipe 8 has a third cooling medium inlet and multiple third cooling medium outlets on its wall. The multiple third cooling medium outlets correspond one-to-one to and are connected to the first cooling medium inlets 401 of the multiple first collecting pipes 4.

[0047] Specifically, Figure 3 As shown, the shunt pipe 8 has a third cooling medium inlet and six third cooling medium outlets, and the six cooling medium outlets are connected to the medium inlets of the second cooling pipes 1 of the six first headers 4. By setting the shunt pipe 8, uniform flow distribution is ensured.

[0048] Optionally, an insulating coating is provided on the outer wall surface of the cooling tube 1 to form insulation between the cooling tube 1 and the battery cell, thereby preventing the battery cell from transferring current to the cooling medium in the cooling tube 1 during high-voltage discharge, causing the risk of leakage, thereby improving the safety of the battery pack.

[0049] The battery pack of an embodiment of the utility model includes a cooling assembly 100 and a battery cell module 200. The cooling assembly 100 is the cooling assembly 100 described in any of the above embodiments. The battery cell module 200 is arranged in the accommodating space 3 between the cooling tube 1 and the cooling plate 2. The cooling tube 1 is arranged at the top of the battery cell module 200 for cooling the poles of the battery cell, and the cooling plate 2 is arranged at the bottom of the battery cell module 200.

[0050] Therefore, the battery pack of the embodiment of the utility model has the advantage of good temperature consistency of the battery cells, so that the electrical performance of the battery pack is better.

[0051] The vehicle of the embodiment of the utility model has the battery pack described in any of the above embodiments. Therefore, the vehicle of the embodiment of the utility model has the advantage of good electrical performance of the battery pack.

[0052] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A cooling assembly, characterized in that: It includes multiple cooling tubes and cooling plates. The cooling tubes are arranged on one side of the cooling plate and define an accommodating space for accommodating a battery cell module between the cooling tubes and the cooling plate. The multiple cooling tubes are arranged at intervals in the width direction of the cooling plate, and the cooling tubes extend along the length direction of the cooling plate. One end of the cooling tubes is an inlet for the cooling medium to flow in, and the other end of the cooling tubes is an outlet for the cooling medium to flow out. The cooling plate has a cooling channel, a channel inlet and a channel outlet. The cooling channel extends along the length direction of the cooling plate. The flow direction of the cooling medium in the cooling tube is opposite to the flow direction of the cooling medium in the cooling channel.

2. The cooling assembly according to claim 1, characterized in that The outlet of the cooling pipe is communicated with the inlet of the flow channel.

3. The cooling assembly according to claim 2, characterized in that: include: a first header, the first header extending in a width direction of the cooling plate, the first header having a first cooling medium inlet and a first cooling medium outlet, the first cooling medium outlet being in communication with the inlet of the cooling tube; and / or The second header extends along the width direction of the cooling plate, and has a second cooling medium inlet and a second cooling medium outlet. The second cooling medium inlet is connected to the outlet of the cooling tube, and the second cooling medium outlet is connected to the flow channel inlet.

4. The cooling assembly according to claim 3, characterized in that: The number of the first current collecting tubes and the number of the second current collecting tubes are both multiple and one-to-one corresponding, and two cooling tubes are arranged between the first current collecting tube and the corresponding second current collecting tube.

5. The cooling assembly according to claim 4, characterized in that There are multiple flow channel inlets, which correspond one-to-one to multiple second manifolds. The second cooling medium outlet of the second manifold is connected to the corresponding flow channel inlet through a connecting pipe, and the connecting pipe extends along the thickness direction of the cooling plate.

6. The cooling assembly according to claim 5, characterized in that The connecting pipe is a bellows; and / or At least one end of the connecting pipe is provided with a quick connector.

7. The cooling assembly according to claim 3, characterized in that It also includes a shunt pipe, which extends along the width direction of the cooling plate. The shunt pipe has a third cooling medium inlet and multiple third cooling medium outlets on its wall. The multiple third cooling medium outlets correspond to and are connected with the first cooling medium inlets of the multiple first collecting pipes.

8. The cooling assembly according to any one of claims 1 to 7, characterized in that: An insulating coating is provided on the outer wall surface of the cooling tube.

9. A battery pack, characterized in that: include: A cooling assembly, wherein the cooling assembly is the cooling assembly according to any one of claims 1 to 8; and A battery cell module is arranged in the accommodating space between the cooling tube and the cooling plate, the cooling tube is arranged at the top of the battery cell module for cooling the pole of the battery cell, and the cooling plate is arranged at the bottom of the battery cell module.

10. A vehicle, characterized in that: Comprising the battery pack described in claim 9.

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