Cooling device for battery pack and battery pack

Abstract

The utility model relates to a cooling device for a battery pack and the battery pack, the cooling device for the battery pack comprises a shell and a runner plate, the interior of the shell is used for accommodating a battery cell module, and the runner plate is located outside the shell and connected with the shell. The runner plate and the outer wall face of the shell are arranged in a spaced mode, a cooling cavity is defined by the runner plate and the outer wall face of the shell, and the cooling cavity is used for being filled with cooling liquid. The cooling device for the battery pack and the battery pack provided by the utility model are simple in structure and low in cost, and are beneficial to avoiding the situation that the cooling liquid leaks into the battery pack to cause insulation failure, short circuit and fire outbreak in the battery pack.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cooling device for a battery pack and a battery pack. Background Art

[0002] The battery pack in new energy vehicles provides the driving force for the vehicle to move forward. The battery pack usually includes a box, a battery cell module and a cold plate. The cold plate is formed by the upper flow channel plate and the lower flow channel plate. The cold plate is fixed in the box, and the battery cell module is glued to the cold plate by glue, thereby achieving the functions of fixing, cooling and heating the battery cell module.

[0003] In this way, there are many components involved in the thermal management of the battery cells in the battery pack, the cost is high, and there is a risk of coolant leaking into the battery pack, causing internal insulation failure, short circuit and fire. Utility Model Content

[0004] Based on this, it is necessary to provide a cooling device for a battery pack and a battery pack that has a simple structure, low cost, and helps to prevent coolant from leaking into the battery pack and causing insulation failure, short circuit and fire inside the battery pack.

[0005] A cooling device for a battery pack is used to cool a cell module. The cooling device for a battery pack includes a shell and a flow channel plate. The shell is used to accommodate the cell module. The flow channel plate is located outside the shell and connected to the shell. The flow channel plate is spaced apart from the outer wall of the shell and encloses a cooling cavity, which is used to fill the cooling liquid.

[0006] In one embodiment, a flow channel is provided in the cooling cavity, and the flow channel is used to circulate the cooling medium; the number of the flow channels is configured to be multiple, and the multiple flow channels are arranged at intervals. It can be understood that in such a configuration, the flow channel is used to guide the flow of the coolant, and by setting the extension form of the flow channel, it is convenient to guide the coolant to be more evenly distributed in the cooling cavity, thereby facilitating uniform heat dissipation of the battery cell module.

[0007] In one embodiment, one of the shell and the flow channel plate is configured to include a connecting plane portion and a plurality of recessed portions, the connecting plane portion is connected to the other of the shell and the flow channel plate; the recessed portions are spaced apart from and surrounded by the other of the shell and the flow channel plate to form a flow channel; or, the shell and the flow channel plate are respectively configured to include a connecting plane portion and a plurality of recessed portions, the connecting plane portion on the shell is connected to the connecting plane portion on the flow channel plate, and the recessed portions on the shell and the recessed portions on the flow channel plate are spaced apart from and surrounded by to form a flow channel.

[0008] In one embodiment, a sealant is provided between adjacent recessed portions on the housing or the flow channel plate, and the sealant is used to seal and isolate adjacent flow channels. It is understandable that such a configuration can prevent adjacent flow channels from being loosely isolated, resulting in leakage of coolant from the flow channels.

[0009] In one embodiment, a groove is formed on the connecting plane portion, and the sealant is placed in the groove. It is understandable that such a configuration can fill more sealant in the groove, thereby improving the sealing between adjacent flow channels.

[0010] In one embodiment, each flow channel extends along the length direction of the flow channel plate, and multiple flow channels are spaced apart along the width direction of the flow channel plate. In addition, along the forward direction of the coolant, adjacent flow channels are connected end to end in sequence to form a serpentine flow channel structure.

[0011] In one embodiment, the cooling device for the battery pack further includes a reinforcing guard plate, which is connected to the outer side of the shell and covers the flow channel plate. It can be understood that in this arrangement, the reinforcing guard plate can protect the flow channel plate, thereby playing a role in protecting the flow channel and the battery pack.

[0012] In one embodiment, the reinforcing guard plate is spaced apart from the flow channel plate and encloses a cavity. It is understandable that, in this arrangement, the cavity can reserve deformation space for the reinforcing guard plate to prevent the reinforcing guard plate from deforming toward the flow channel plate due to impact and scratching the flow channel plate.

[0013] In one embodiment, the cooling device for the battery pack further includes a heat-conducting structural adhesive layer, which is arranged inside the shell and is used to bond the battery cell module to the inner wall surface of the shell. It can be understood that such an arrangement enables the battery cell module to be firmly assembled inside the shell. The heat-conducting structural adhesive layer has good thermal conductivity, which is conducive to heat exchange between the battery cell module and the cooling device for the battery pack.

[0014] A battery pack includes a battery cell module and a cooling device for the battery pack as described in any one of the above embodiments.

[0015] Compared with the cooling cavity formed by two layers of flow channel plates in the related structure, the cooling device and battery pack provided by the present application form a cooling cavity by setting and enclosing the flow channel plate and the outer side of the shell, reducing one layer of flow channel plate, thereby simplifying the parts included in the cooling device for the battery pack, which is conducive to reducing costs. In addition, the battery cell module is located on the inside of the shell, and the cooling cavity is on the outside of the shell, which realizes the separation of the battery cell module from the cooling system, thereby helping to reduce the risk of coolant leaking into the shell and causing insulation failure and short circuit fire inside the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 An axonometric view of a cooling device for a battery pack provided in this application;

[0018] Figure 2 A front view of a cooling device for a battery pack provided in the present application;

[0019] Figure 3 for Figure 2 Sectional view at AA;

[0020] Figure 4 An exploded view of the cooling device for the battery pack provided in this application.

[0021] Figure numerals: 100, cooling device for battery pack; 10, shell; 20, flow channel plate; 21, connecting plane portion; 211, groove; 22, recessed portion; 23, sealant; 30, cooling chamber; 31, flow channel; 311, inlet; 312, outlet; 40, thermal conductive structural adhesive layer; 50, reinforcement guard plate; 51, cavity; 60, water inlet nozzle; 70, water outlet nozzle. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0024] 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 this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in 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.

[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0027] See also Figures 1 to 4 , the present application provides a cooling device 100 for a battery pack, which is used to cool a battery cell module. The cooling device 100 for a battery pack includes a shell 10 and a flow channel plate 20. The shell 10 is used to accommodate batteries. The flow channel plate 20 is located outside the shell 10 and connected to the shell 10, wherein the flow channel plate 20 is spaced apart from the outer wall of the shell 10 and encloses a cooling cavity 30, which is used to fill the cooling liquid. Compared with the cooling cavity formed by two layers of flow channel plates in the related structure, the present application reduces one layer of flow channel plate by spacing and enclosing the cooling cavity 30 between the flow channel plate 20 and the outer side of the shell 10, thereby simplifying the parts included in the cooling device 100 for a battery pack, which is beneficial to reducing costs. In addition, the battery cell module is located on the inner side of the shell 10, and the cooling cavity 30 is on the outer side of the shell 10, so that the battery cell module is separated from the cooling system, which is beneficial to reducing the risk of cooling liquid leaking into the shell and causing insulation failure, short circuit and fire inside the shell 10. The flow channel plate 20 and the shell 10 may be connected by welding, and specifically by spot welding.

[0028] The housing 10 is formed by a bottom wall and a plurality of side walls connected to the periphery of the bottom wall, wherein the flow channel plate 20 can be connected to the outer side of the side wall of the housing 10 or the outer side of the bottom wall of the housing 10. The following takes the case where the flow channel plate 20 is connected to the outer side of the bottom wall of the housing 10 as an example to introduce the cooling device 100 for a battery pack.

[0029] like Figure 4 As shown, the cooling device 100 for a battery pack further includes a heat-conducting structural adhesive layer 40, which is disposed inside the housing 10 and is used to bond the battery cell module to the inner wall surface of the housing 10. In this way, the battery cell module can be more firmly installed inside the housing 10. In addition, the heat-conducting structural adhesive layer 40 has good thermal conductivity, which is conducive to heat exchange between the battery cell module and the cooling device 100 for a battery pack.

[0030] A flow channel 31 is provided in the cooling cavity 30, and the flow channel 31 is used to circulate the cooling medium. The number of the flow channels 31 is configured to be multiple, and the multiple flow channels 31 are arranged at intervals. The flow channel 31 is used to guide the flow of the coolant. By setting the extended form of the flow channel 31, it is convenient to guide the coolant to be more evenly distributed in the cooling cavity 30, so as to facilitate uniform heat exchange of the battery cell module.

[0031] For example, in one embodiment, Figure 4 As shown, each flow channel 31 extends along the length direction of the flow channel plate 20, and multiple flow channels 31 are arranged at intervals along the width direction of the flow channel plate 20, and adjacent flow channels 31 are connected end to end in sequence along the forward direction of the coolant to form a serpentine flow channel structure. In this way, multiple flow channels 31 are connected to form a longer serpentine flow channel structure, and along the width direction of the flow channel plate 20, the two flow channels 31 located at the edge are respectively used for the coolant to flow into the serpentine flow channel structure and for the coolant to flow out of the serpentine flow channel structure.

[0032] Furthermore, the serpentine flow channel also has an inlet 311 and an outlet 312, which are located at the same end of the flow channel plate 20 along the length direction of the flow channel plate 20 and are used to connect to external pipelines through the water inlet nozzle 60 and the water outlet nozzle 70 respectively.

[0033] A recessed portion 22 is formed by punching on the bottom wall of the shell 10 or the flow channel plate 20 . The recessed portion 22 is used to form the flow channel 31 , which specifically includes the following three forms.

[0034] Embodiment one:

[0035] The housing 10 is configured to include a connecting plane portion 21 and a plurality of recessed portions 22 . The connecting plane portion 21 is connected to the flow channel plate 20 . The recessed portions 22 are spaced apart from the flow channel plate 20 and surround the flow channel 31 .

[0036] Embodiment three:

[0037] like Figure 4 As shown, the flow channel plate 20 is configured to include a connecting plane portion 21 and a plurality of recessed portions 22 . The connecting plane portion 21 is connected to the housing 10 . The recessed portions 22 are spaced apart from the housing 10 and surround the housing 10 to form a flow channel 31 .

[0038] Optionally, an abutting protrusion is provided on the outer wall surface of the housing 10 corresponding to the connecting plane portion 21 , and the abutting protrusion is used to abut against the connecting plane portion 21 .

[0039] Embodiment three:

[0040] The shell 10 and the flow channel plate 20 are respectively configured to include a connecting plane portion 21 and a plurality of recessed portions 22. The connecting plane portion 21 on the shell 10 is connected to the connecting plane portion 21 on the flow channel plate 20. The recessed portions 22 on the shell 10 and the recessed portions 22 on the flow channel plate 20 are spaced apart and surrounded to form a flow channel 31.

[0041] In other embodiments, the flow channel 31 may be formed by providing a partition rib between the bottom wall of the shell 10 and the flow channel plate 20 .

[0042] In one embodiment, Figure 4 As shown, on the flow channel plate 20, sealant 23 is provided between adjacent recessed portions 22, and the sealant 23 is used to seal and isolate adjacent flow channels 31. In this way, it is possible to avoid that the adjacent flow channels 31 are not tightly isolated, resulting in leakage of coolant from the flow channels 31. Of course, in another embodiment, the sealant 23 can also be provided on the housing 10.

[0043] Furthermore, if Figure 3 As shown, a groove 211 is formed on the connecting plane portion 21, and the sealant 23 is accommodated in the groove 211. In this way, more sealant 23 can be filled in the groove 211, thereby improving the sealing between adjacent flow channels 31.

[0044] Exemplarily, in one embodiment, each flow channel 31 extends along the length direction of the flow channel plate 20, and the multiple flow channels 31 are spaced apart along the width direction of the flow channel plate 20, and, along the forward direction of the coolant, adjacent flow channels 31 are connected end to end in sequence to form a longer serpentine flow channel, and the number of grooves 211 is configured to be two, and the two grooves 211 are respectively arranged around the inner circle and the outer circle of the serpentine flow channel.

[0045] like Figure 4 As shown, the cooling device 100 for the battery pack further includes a reinforcing guard plate 50, which is connected to the outer side of the bottom wall of the housing 10 and covers the flow channel plate 20. In this way, the reinforcing guard plate can protect the flow channel plate 20, thereby playing a role in protecting the flow channel 31 and the battery pack. The reinforcing guard plate 50 can be connected to the bottom wall of the housing 10 by spot welding.

[0046] Of course, in other embodiments, the reinforcing guard plate may not be provided, and the flow channel plate 20 may be made of a steel plate with higher structural strength. In this way, in addition to being used to form the flow channel 31, the flow channel plate 20 may also take into account the bottom protection function, thereby improving the integration of the battery pack.

[0047] Furthermore, the reinforcing guard plate 50 is spaced apart from the flow channel plate 20 and encloses a cavity 51. Thus, the cavity 51 can reserve a deformation space for the reinforcing guard plate 50, thereby preventing the reinforcing guard plate 50 from deforming toward the flow channel plate 20 due to impact and directly scratching the flow channel plate 20.

[0048] The present application also provides a battery pack, which includes the cooling device 100 for the battery pack described in any one of the above embodiments.

[0049] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A cooling device for a battery pack, used for cooling a battery cell module, characterized in that: The cooling device for a battery pack comprises a shell (10) and a flow channel plate (20); the shell (10) is used to accommodate a battery cell module, and the flow channel plate (20) is located outside the shell (10) and connected to the shell (10); The flow channel plate (20) is spaced apart from the outer wall surface of the shell (10) and surrounds a cooling cavity (30), wherein the cooling cavity (30) is used to be filled with cooling liquid.

2. The cooling device for a battery pack according to claim 1, characterized in that: A flow channel (31) is provided in the cooling cavity (30), and the flow channel (31) is used for circulating a cooling medium; The number of the flow channels (31) is configured to be multiple, and the multiple flow channels (31) are arranged at intervals.

3. The cooling device for a battery pack according to claim 2, characterized in that: One of the shell (10) and the flow channel plate (20) is configured to include a connecting plane portion (21) and a plurality of recessed portions (22), the connecting plane portion (21) being connected to the other of the shell (10) and the flow channel plate (20); the recessed portions (22) are spaced apart from the other of the shell (10) and the flow channel plate (20) and surround the flow channel (31); Alternatively, the shell (10) and the flow channel plate (20) are respectively configured to include a connecting plane portion (21) and a plurality of recessed portions (22); the connecting plane portion (21) on the shell (10) is connected to the connecting plane portion (21) on the flow channel plate (20); and the recessed portions (22) on the shell (10) and the recessed portions (22) on the flow channel plate (20) are spaced apart and enclosed to form the flow channel (31).

4. The cooling device for a battery pack according to claim 3, characterized in that: On the housing (10) or the flow channel plate (20), a sealant (23) is provided between adjacent recessed portions (22), and the sealant (23) is used to seal and isolate adjacent flow channels (31).

5. The cooling device for a battery pack according to claim 4, characterized in that: A groove (221) is formed on the connecting plane portion (21), and the sealant (23) is accommodated in the groove (221).

6. The cooling device for a battery pack according to claim 2, characterized in that: Each of the flow channels (31) extends along the length direction of the flow channel plate (20), and a plurality of the flow channels (31) are arranged at intervals along the width direction of the flow channel plate (20), and, along the forward direction of the coolant, adjacent flow channels (31) are connected end to end in sequence to form a serpentine flow channel structure.

7. The cooling device for a battery pack according to claim 1, characterized in that: The battery pack cooling device further comprises a reinforcing guard plate (50), wherein the reinforcing guard plate (50) is connected to the outside of the shell (10) and covers the flow channel plate (20).

8. The cooling device for a battery pack according to claim 7, characterized in that: The reinforcing guard plate (50) and the flow channel plate (20) are spaced apart from each other and surround a cavity (51).

9. The cooling device for a battery pack according to claim 1, characterized in that: The cooling device for the battery pack further comprises a heat-conducting structural adhesive layer (40), which is arranged inside the shell (10) and is used to bond the battery cell module to the inner wall surface of the shell (10).

10. A battery pack, characterized in that: It comprises a battery cell module and a cooling device for a battery pack as described in any one of claims 1 to 9.

Images