Battery pack and vehicle

Abstract

The utility model relates to a battery pack and a vehicle. The battery pack comprises a battery cut-off unit and a cooling plate arranged on one side of the battery cut-off unit. The battery cut-off unit comprises a shell and a copper bar arranged in the shell, a receding opening is formed in the side, facing the cooling plate, of the shell, and the position of the receding opening corresponds to that of the copper bar; a heat conduction connecting piece is arranged between the shell and the cooling plate, the heat conduction connecting piece is arranged at the receding opening in a sealing and covering mode and makes heat exchange contact with the copper bar and the cooling plate, the face, facing the shell, of the heat conduction connecting piece is fixedly connected with the shell, and the face, facing the cooling plate, of the heat conduction connecting piece is fixedly connected with the cooling plate. The heat conduction connecting piece at least forms a sealed space on the circumferential outer side of the avoiding opening, and the avoiding opening and the copper bar are both located in the sealed space, so that if water enters the battery pack or cooling liquid leaks from the cooling plate, the water or the cooling liquid is blocked by the heat conduction connecting piece, the sealing performance between the battery cut-off unit and the cooling plate is improved, and the service life of the battery cut-off unit is prolonged. And the insulation performance and the use safety performance are high.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a battery pack and a vehicle. Background Art

[0002] The battery pack is equipped with a battery disconnect unit (BDU) and a cooling plate. The BDU includes a shell, a copper busbar is arranged inside the shell, and a clearance is provided at the position of the copper busbar in the shell. The cooling plate is located on the side of the shell where the clearance is provided, and is bolted to the shell. When the BDU is working, the working heat of the copper busbar is dissipated through the cooling plate.

[0003] However, in the prior art, the sealing between the BDU and the cooling plate is poor. If water enters the battery pack or there is a coolant leak on the cooling plate, water or coolant can easily enter from the escape hole, resulting in poor insulation of the copper busbar area, and thus poor safety. Utility Model Content

[0004] In order to solve the above technical problems, the present disclosure provides a battery pack and a vehicle.

[0005] In a first aspect, the present disclosure provides a battery pack, comprising a battery cut-off unit and a cooling plate disposed on one side of the battery cut-off unit;

[0006] The battery disconnection unit comprises a shell and a copper bar arranged in the shell, and a relief opening is provided on a side of the shell facing the cooling plate, and the position of the relief opening corresponds to the copper bar;

[0007] A heat-conducting connector is provided between the shell and the cooling plate, and a sealing cover of the heat-conducting connector is provided at the avoidance opening and is in heat-exchange contact with both the copper busbar and the cooling plate.

[0008] Optionally, at least part of the thermally conductive connector is in contact with the copper busbar;

[0009] At least a portion of the thermally conductive connector is in contact with the cooling plate.

[0010] Optionally, the thickness of the thermally conductive connector at the avoidance opening is greater than the thickness of the thermally conductive connector at other positions, and the thermally conductive connector is sealed and filled in the avoidance opening at a position corresponding to the avoidance opening, and is in heat exchange contact with the copper busbar.

[0011] Optionally, the thickness of the heat-conductive connector at the avoidance opening is not less than the distance between a side of the copper busbar facing the cooling plate and a side of the cooling plate facing the shell.

[0012] Optionally, the shape of the heat-conductive connector matches the shape of a surface of the housing facing the cooling plate.

[0013] Optionally, the thermally conductive connector is bonded to the cooling plate.

[0014] Optionally, the heat-conductive connector is bonded to a surface of the shell facing the cooling plate.

[0015] Optionally, the heat-conductive connecting member is a heat-conductive structural adhesive, and the heat-conductive structural adhesive is respectively bonded to the cooling plate and a surface of the shell facing the cooling plate.

[0016] Optionally, the shell includes an upper shell and a lower shell, the upper shell and the lower shell together form a containing cavity, and the copper busbar is located in the containing cavity;

[0017] The avoidance opening is arranged on the lower shell, and the cooling plate is located on a side of the lower shell facing away from the upper shell.

[0018] In a second aspect, the present disclosure also provides a vehicle, comprising the above-mentioned battery pack.

[0019] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0020] The battery pack and vehicle provided by the present disclosure are provided with a battery cut-off unit and a cooling plate, and the cooling plate is located on one side of the battery cut-off unit. The battery cut-off unit includes a shell and a copper bar arranged in the shell, and a bypass port is provided on the side of the shell facing the cooling plate, and the position of the bypass port corresponds to the copper bar, that is, the bypass port is located between the copper bar and the cooling plate. A heat-conducting connector is provided between the shell and the cooling plate, and a sealing cover of the heat-conducting connector is provided at the bypass port, and is in heat exchange contact with both the copper bar and the cooling plate. Based on this, the heat-conducting connector forms at least a sealed space on the circumferential outer side of the bypass port, and the copper bar is located in the sealed space. In other words, the bypass port and the copper bar are both located in the sealed space formed by the heat-conducting connector. In this way, if water enters the battery pack or coolant leaks from the cooling plate, the water or coolant is blocked by the heat-conducting connector, thereby preventing water or coolant from entering the battery cut-off unit from the bypass port, thereby improving the sealing performance between the battery cut-off unit and the cooling plate, thereby improving the insulation performance of the copper bar area, and having a high safety performance in use. At the same time, since the sealing cover of the thermally conductive connector is arranged at the avoidance port and is in heat exchange contact with the copper busbar and the cooling plate, the avoidance port is also filled with the thermally conductive connector, and there is basically no air in the area where the copper busbar is located. Therefore, during cooling, although the surface temperature of the copper busbar is low, condensation water droplets will not occur on the surface of the copper busbar, which further improves the insulation performance of the copper busbar area and is safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 A schematic diagram of a partial structure of a battery pack according to an embodiment of the present disclosure;

[0024] Figure 2 is an isometric view of a battery pack according to an embodiment of the present disclosure;

[0025] Figure 3 A partial exploded view of the battery pack according to an embodiment of the present disclosure.

[0026] Among them, 1. battery cut-off unit; 11. shell; 111. upper shell; 112. lower shell; 12. copper busbar; 2. cooling plate; 3. avoidance port; 4. thermal conductive connector. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0029] refer to Figures 1 to 3 As shown, this embodiment provides a battery pack, which can be used in new energy vehicles, for example.

[0030] Specifically, the battery pack includes a box (not shown) and a battery disconnection unit 1 and a cooling plate 2 arranged in the box. The cooling plate 2 is arranged on one side of the battery disconnection unit 1. The battery disconnection unit 1 is a device for connecting and disconnecting high voltage electricity of the battery pack, and plays a vital role in the safety of the battery pack.

[0031] Specifically, refer to Figure 1As shown, the battery disconnection unit 1 includes a housing 11 and a copper bar 12 disposed in the housing 11. A relief opening 3 is provided on one side of the housing 11 facing the cooling plate 2. The position of the relief opening 3 corresponds to the copper bar 12. The relief opening 3 is located between the copper bar 12 and the cooling plate 2. Figure 2 and Figure 3 As shown, a heat-conducting connector 4 is provided between the shell 11 and the cooling plate 2 . The sealing cover of the heat-conducting connector 4 is provided at the avoidance opening 3 and is in heat-exchange contact with both the copper bus 12 and the cooling plate 2 .

[0032] The sealing cover of the heat-conducting connector 4 is arranged at the avoidance opening 3, and is in heat-exchange contact with the copper busbar 12 and the cooling plate 2. Specifically, it can be understood that the part of the heat-conducting connector 4 corresponding to the avoidance opening 3 is sealed and filled in the avoidance opening 3, and the part of the heat-conducting connector 4 filled in the avoidance opening 3 is in heat-exchange contact with the copper busbar 12, and the heat-conducting connector 4 is in heat-exchange contact with the cooling plate 2.

[0033] By arranging the sealing cover of the heat-conducting connector 4 at the avoidance port 3 and making heat exchange contact with the copper busbar 12 and the cooling plate 2, the heat-conducting connector 4 forms a sealed space at least on the circumferential outside of the avoidance port 3, and the avoidance port 3 and the copper busbar 12 are both located in the sealed space. In this way, even if water enters the battery pack or there is a coolant leak on the cooling plate 2, the water or coolant will be blocked by the heat-conducting connector 4, thereby preventing water or coolant from entering the battery cut-off unit 1 from the avoidance port 3, thereby improving the sealing performance between the battery cut-off unit 1 and the cooling plate 2, and further improving the insulation performance of the copper busbar 12 area, and having a high safety performance in use.

[0034] In addition, since part of the heat-conducting connector 4 is sealed and filled in the avoidance port 3, the heat-conducting connector 4 is in heat exchange contact with the copper busbar 12 and the cooling plate 2, and the avoidance port 3 is filled with the heat-conducting connector 4, and there is basically no air in the avoidance port 3. In this way, when the copper busbar 12 is cooled, although the surface temperature of the copper busbar 12 is low, since it is sealed and there is no air between it and the cooling plate 2, no condensed water droplets will be generated on the surface of the copper busbar 12, thereby avoiding the poor insulation of the copper busbar 12 caused by condensed water droplets, thereby improving the safety of use.

[0035] The battery pack and vehicle provided in this embodiment are provided with a battery cut-off unit 1 and a cooling plate 2, wherein the cooling plate 2 is located on one side of the battery cut-off unit 1. The battery cut-off unit 1 includes a housing 11 and a copper bar 12 disposed in the housing 11, and a clearance opening 3 is provided on one side of the housing 11 facing the cooling plate 2, and the position of the clearance opening 3 corresponds to the copper bar 12, that is, the clearance opening 3 is located between the copper bar 12 and the cooling plate 2. A heat-conducting connector 4 is arranged between the shell 11 and the cooling plate 2. The sealing cover of the heat-conducting connector 4 is arranged at the avoidance port 3 and is in heat exchange contact with the copper busbar 12 and the cooling plate 2. Based on this, the heat-conducting connector 4 forms a sealed space at least on the circumferential outside of the avoidance port 3, and the copper busbar 12 is located in the sealed space. In other words, the avoidance port 3 and the copper busbar 12 are both located in the sealed space formed by the heat-conducting connector 4. In this way, if water enters the battery pack or coolant leaks from the cooling plate 2, the water or coolant is blocked by the heat-conducting connector 4, thereby preventing water or coolant from entering the battery cut-off unit 1 from the avoidance port 3, thereby improving the sealing performance between the battery cut-off unit 1 and the cooling plate 2, thereby improving the insulation performance of the copper busbar 12 area, and having a high safety performance in use. At the same time, since the sealing cover of the heat-conducting connector 4 is arranged at the avoidance opening 3 and is in heat exchange contact with the copper busbar 12 and the cooling plate 2, the avoidance opening 3 is also filled with the heat-conducting connector 4, and there is basically no air in the area where the copper busbar 12 is located. In this way, during cooling, although the surface temperature of the copper busbar 12 is low, condensation water droplets will not occur on the surface of the copper busbar 12, which further improves the insulation performance of the copper busbar 12 area and is safer to use.

[0036] In some embodiments, at least part of the heat-conducting connector 4 is in contact with the copper bar 12. At least part of the heat-conducting connector 4 is in contact with the cooling plate 2, so that the heat-conducting connector 4 can be in direct contact with the copper bar 12 and the cooling plate 2 respectively, so that the heat exchange efficiency between the copper bar and the cooling plate is higher, thereby improving the heat dissipation performance of the battery disconnection unit 1 and helping to extend its service life.

[0037] In other embodiments, the heat-conducting connector 4 may be connected to the copper busbar by a heat-conducting adhesive such as heat-conducting silicone grease. The heat-conducting connector 4 may be connected to the cooling plate by heat-conducting silicone grease, for example.

[0038] In some embodiments, the thickness of the thermally conductive connector 4 at the avoidance opening 3 is greater than the thickness of the thermally conductive connector 4 at other positions, and the thermally conductive connector 4 is sealed and filled in the avoidance opening 3 at the position corresponding to the avoidance opening 3, and is in heat exchange contact with the copper bus 12. The structure is simple, easy to assemble, and has good sealing performance. While achieving sealing, it is also easy to achieve heat exchange contact between the thermally conductive connector 4 and the copper bus 12.

[0039] By setting the thickness of the heat-conducting connector 4 corresponding to the avoidance opening 3 to be relatively large, when the heat-conducting connector 4 and the shell 11 are fixed in place, the portion of the heat-conducting connector 4 with a larger thickness corresponding to the avoidance opening 3 is filled in the avoidance opening 3, and the portion filled in the avoidance opening 3 is in sealing contact with the hole wall of the avoidance opening 3, so that while achieving a sealed connection, the heat-conducting connector 4 is in heat exchange contact with the copper busbar 12, which is convenient for cooling and dissipating the heat of the copper busbar 12.

[0040] In a specific implementation, the heat-conducting connector 4 at the position corresponding to the avoidance opening 3 protrudes from the heat-conducting connector 4 at other positions by 1 mm-2 mm.

[0041] In some embodiments, the thickness of the thermally conductive connector 4 at the avoidance opening 3 is not less than the distance between the side of the copper busbar 12 facing the cooling plate 2 and the side of the cooling plate 2 facing the shell 11, that is, the thickness of the thermally conductive connector 4 at the avoidance opening 3 is greater than or equal to the distance between the copper busbar 12 and the cooling plate 2, further achieving the sealing performance at the avoidance opening 3, thereby further improving the sealing and insulation performance between the battery cut-off unit 1 and the cooling plate 2.

[0042] In some embodiments, the shape of the thermally conductive connector 4 matches the shape of the side of the shell 11 facing the cooling plate 2, that is, the shape of the thermally conductive connector 4 is contoured to the shape of the side of the shell 11 facing the cooling plate 2. On the one hand, it has better aesthetics, and on the other hand, the thermally conductive connector 4 and the side of the shell 11 facing the cooling plate 2 can be fully sealed and connected, thereby achieving better sealing performance between the battery cut-off unit 1 and the cooling plate 2, more secure connection, and higher insulation and safety performance.

[0043] In some embodiments, reference Figure 2 and Figure 3 As shown, the heat-conducting connector 4 is bonded to the cooling plate 2 , and the heat-conducting connector 4 is bonded to a surface of the housing 11 facing the cooling plate 2 .

[0044] The battery cut-off unit 1 and the cooling plate 2 are bonded and fixed together by the heat-conducting connector 4. In this way, the heat-conducting connector 4 not only plays a role of sealing and heat dissipation, but also has a function of connection and fixing. Compared with the solution in the prior art in which the battery cut-off unit 1 and the cooling plate 2 are connected by bolts, there is no need to provide mounting holes for the bolts to pass through on the battery cut-off unit 1 and the cooling plate 2, which not only enhances the structural strength of the battery cut-off unit 1 and the cooling plate 2, but also simplifies the assembly process and improves work efficiency.

[0045] In specific implementation, the heat-conducting connector 4 can be bonded to the cooling plate, for example, by heat-conducting silicone grease. The heat-conducting connector 4 can be bonded to the housing 11, for example, by heat-conducting silicone grease.

[0046] In some embodiments, the heat-conducting connector 4 is a heat-conducting structural adhesive, which has a simple structure and is easy to manufacture. The heat-conducting structural adhesive is respectively bonded to the cooling plate 2 and the side of the shell 11 facing the cooling plate 2, and the bonding is convenient and firm. In this way, the shell 11 of the battery cut-off unit 1 can be directly fixed on the cooling plate 2 through the heat-conducting connector 4. Compared with the solution in the prior art in which the battery cut-off unit 1 and the cooling plate 2 are connected by bolts, there is no need to open mounting holes for the bolts to pass through on the battery cut-off unit 1 and the cooling plate 2, which not only enhances the structural strength of the battery cut-off unit 1 and the cooling plate 2, but also simplifies the assembly process and improves work efficiency.

[0047] In other embodiments, the thermally conductive connecting member 4 may be, for example, a liquid thermally conductive structural adhesive.

[0048] In some embodiments, the shell 11 includes an upper shell 111 and a lower shell 112, which together form a receiving cavity, and the copper bus 12 is located in the receiving cavity, wherein the upper shell 111 and the lower shell 112 can be detachably connected together, for example, by a snap, with a simple structure, and convenient assembly and replacement.

[0049] In a specific implementation, the avoidance opening 3 is arranged on the lower shell 112 , and the cooling plate 2 is located on the side of the lower shell 112 away from the upper shell 111 , which has a simple structure and is easy to manufacture.

[0050] This embodiment also provides a vehicle, which includes a battery pack.

[0051] The battery pack in this embodiment has the same specific structure and implementation principle as the battery pack provided in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above embodiment.

[0052] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0053] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack, characterized in that: It includes a battery cut-off unit and a cooling plate arranged on one side of the battery cut-off unit; The battery disconnection unit comprises a shell and a copper bar arranged in the shell, and a relief opening is provided on a side of the shell facing the cooling plate, and the position of the relief opening corresponds to the copper bar; A heat-conducting connector is provided between the shell and the cooling plate, and a sealing cover of the heat-conducting connector is provided at the avoidance opening and is in heat-exchange contact with both the copper busbar and the cooling plate.

2. The battery pack according to claim 1, characterized in that: At least part of the thermally conductive connector is in contact with the copper busbar; At least a portion of the thermally conductive connector is in contact with the cooling plate.

3. The battery pack according to claim 1, characterized in that: The thickness of the heat-conductive connector at the avoidance opening is greater than the thickness of the heat-conductive connector at other positions, and the heat-conductive connector is sealed and filled in the avoidance opening at a position corresponding to the avoidance opening, and is in heat-exchange contact with the copper busbar.

4. The battery pack according to claim 3, characterized in that: The thickness of the heat-conducting connector at the avoidance opening is not less than the distance between a side of the copper bar facing the cooling plate and a side of the cooling plate facing the shell.

5. The battery pack according to claim 1, characterized in that: The shape of the heat-conducting connecting piece matches the shape of a surface of the housing facing the cooling plate.

6. The battery pack according to claim 1, characterized in that: The heat-conductive connecting member is bonded to the cooling plate.

7. The battery pack according to claim 1, characterized in that: The heat-conducting connector is bonded to a surface of the housing that faces the cooling plate.

8. The battery pack according to any one of claims 1 to 5, characterized in that: The heat-conductive connecting member is a heat-conductive structural adhesive, and the heat-conductive structural adhesive is respectively bonded to the cooling plate and a surface of the shell facing the cooling plate.

9. The battery pack according to any one of claims 1 to 7, characterized in that: The housing comprises an upper housing and a lower housing, the upper housing and the lower housing together form a receiving cavity, and the copper busbar is located in the receiving cavity; The avoidance opening is arranged on the lower shell, and the cooling plate is located on a side of the lower shell facing away from the upper shell.

10. A vehicle, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 7.

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