BDU unit and battery pack

Abstract

The utility model provides a BDU unit and a battery pack, and relates to the technical field of batteries. According to the BDU unit, the shell and the heat exchange mechanism are arranged, the shell is provided with the containing cavity used for containing the electrical parts, and the containing groove with one end open is formed in the position, at least partially surrounding the containing cavity, in the side wall of the shell; the heat exchange mechanism is arranged in the containing groove through the opening and makes contact with the cavity wall of the containing cavity. Furthermore, the heat exchange mechanism is mounted in the accommodating groove of the shell, so that the heat exchange mechanism and the shell used for accommodating the electrical parts form an integral structure, the heat exchange mechanism does not occupy extra space, and the heat exchange mechanism is in contact with the cavity wall of the accommodating cavity and can exchange heat with heat generated by the electrical parts in the accommodating cavity; and the heat exchange effect of the BDU unit is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a BDU unit and a battery pack. Background Art

[0002] BDU (Battery Disconnect Unit) is specially designed for battery packs. It is a device that disconnects and connects high voltage electricity to the power battery of new energy vehicles. It plays a vital role in the safety of battery packs and is a relatively important component in new energy vehicles. In the prior art, the BDU unit is usually set in the battery pack box together with the battery pack. In order to ensure the normal operating temperature of the battery, a liquid cooling system is usually set for the battery pack to cool the battery pack.

[0003] However, although the liquid cooling system for battery packs in the prior art can cool down the battery packs, it cannot cool down the BDU units. If the BDU unit cannot be cooled, the internal copper bar will heat up and the current carrying capacity will be reduced, thus affecting the performance of the BDU unit and further affecting the performance of the entire battery pack, such as the safety and stability of the battery pack. Therefore, providing a BDU unit with cooling function is a technical problem that needs to be solved urgently in the battery field. Utility Model Content

[0004] The purpose of the present application is to provide a BDU unit and a battery pack to solve the technical problem in the prior art that the BDU unit cannot be effectively cooled.

[0005] To achieve the above purpose, the technical solution adopted in this application is:

[0006] In the first aspect, the present application provides a BDU unit, comprising: a shell and a heat exchange mechanism, the shell being provided with a accommodating cavity for accommodating electrical components, a accommodating groove having an open end being provided inside the side wall of the shell and at least partially surrounding the accommodating cavity; the heat exchange mechanism being arranged in the accommodating groove through the opening and in contact with the cavity wall of the accommodating cavity.

[0007] In one or more embodiments of the present application, the accommodating cavity includes first cavity walls that are arranged opposite to each other, and a plurality of heat dissipation holes are arranged on the first cavity walls at intervals, and the heat dissipation holes are used to connect the accommodating cavity with the heat exchange mechanism.

[0008] In one or more embodiments of the present application, the heat exchange mechanism includes: a liquid cooling plate, a liquid inlet and a liquid outlet, the cross-sectional shape of the liquid cooling plate is consistent with the cross-sectional shape of the receiving tank, the thickness of the liquid cooling plate is consistent with the slot width of the receiving tank, and a cooling medium channel is provided inside the liquid cooling plate; the liquid inlet and the liquid outlet are both connected to the cooling medium channel.

[0009] In one or more embodiments of the present application, the opening of the receiving groove is arranged away from the opening of the receiving cavity.

[0010] The outer side wall of the shell facing away from the accommodating cavity is provided with an avoidance groove for avoiding the liquid inlet and the liquid outlet. The avoidance groove is connected with the accommodating groove, and the avoidance groove also has a avoidance port connected with the open port of the accommodating groove.

[0011] In one or more embodiments of the present application, a stopper is provided at the bottom of the outer side wall of the housing facing away from the accommodating cavity, and a gap is provided between the two sides of the stopper and the outer side wall of the housing;

[0012] A stop block extends from the stop member toward one side of the accommodating groove, the bottom surface of the stop block is inclined upward toward the inside of the accommodating groove, the top surface of the stop block is a planar structure, and the height of the liquid cooling plate is consistent with the distance from the top of the accommodating groove to the top surface of the stop block.

[0013] In one or more embodiments of the present application, a first mounting groove is provided on the housing for mounting the controller, the first mounting groove is provided on the opening side of the housing facing the accommodating cavity, and a mounting hole is provided at the bottom of the first mounting groove;

[0014] A second mounting groove is also provided inside the accommodating cavity, and the second mounting groove is used for mounting the relay;

[0015] A copper busbar connection portion is provided on the first cavity wall of the accommodating cavity.

[0016] In one or more embodiments of the present application, it also includes:

[0017] The cover body covers the opening of the accommodating cavity of the shell, and a clearance groove is provided at a position of the cover body corresponding to the copper bar connecting portion.

[0018] In one or more embodiments of the present application, a clamping piece is provided on the cover body, and a clamping slot is provided on the shell body. When the cover body is closed onto the shell body, the clamping piece is clamped into the clamping slot.

[0019] In one or more embodiments of the present application, a fixing hole for fixing the shell is provided on the shell.

[0020] In a second aspect, the present application also provides a battery pack, comprising: the BDU unit described in any one of the first aspects.

[0021] Based on the above technical solution, the BDU unit and battery pack provided by the embodiment of the present application have at least the following beneficial technical effects:

[0022] The BDU unit provided in the embodiment of the present application is provided with a shell and a heat exchange mechanism. The shell has a housing cavity for accommodating electrical components. A housing groove with an open end is provided inside the side wall of the shell and at least partially around the housing cavity. The heat exchange mechanism is provided in the housing groove through the opening and contacts the cavity wall of the housing cavity. Furthermore, by installing the heat exchange mechanism in the housing groove of the shell, the heat exchange mechanism and the shell for accommodating electrical components form an integral structure, so that the heat exchange mechanism does not occupy additional space. The heat exchange mechanism contacts the cavity wall of the housing cavity and can exchange heat with the heat generated by the electrical components in the housing cavity, which greatly improves the heat exchange effect and heat exchange efficiency of the BDU unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be 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 paying creative labor.

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the BDU unit of the present application.

[0025] Figure 2 It is a schematic diagram of the exploded structure of the BDU unit of the present application.

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the shell of the present application.

[0027] Figure 4 It is a left view of the BDU unit of the present application.

[0028] Figure 5 yes Figure 4 Middle AA cross section.

[0029] Figure 6 It is a schematic diagram of the structure of the shell of the present application from a bottom perspective.

[0030] Figure 7 It is a three-dimensional structural schematic diagram of the heat exchange mechanism of the present application.

[0031] Figure 8 It is a left view of the heat exchange mechanism of the present application.

[0032] Fig. 9 yes Figure 8 Middle BB cross section.

[0033] Fig.10 It is a top view of the shell of the present application.

[0034] In the figure: 1-shell; 2-heat exchange mechanism; 3-cover; 100-accommodating groove; 101-avoiding groove; 102-card slot; 103-heat dissipation hole; 104-first cavity wall; 105-stopper; 106-gap; 107-fixing hole; 108-first installation groove; 109-copper busbar connection part; 110-second installation groove; 112-accommodating cavity; 1011-avoiding port; 1051-stopper; 1081-installation hole; 200-liquid cooling plate; 201-liquid outlet; 202-liquid inlet; 203-cooling medium channel; 2001-first end; 2002-second end; 2003-liquid cooling plate body; 301-card; 302-avoiding groove. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] The BDU unit serves as a device for disconnecting and connecting high voltage electricity to the battery, and is usually installed in the battery pack case together with the battery pack. However, in the related art, there is only a liquid cooling system for the battery pack, and no separate liquid cooling system is provided for the BDU unit. If the BDU unit cannot be cooled or the cooling effect is poor, the internal copper busbar will heat up and the current carrying capacity will be reduced, thereby affecting the performance of the BDU unit and further affecting the performance of the entire battery pack, such as the safety and stability of the battery pack.

[0040] Based on the above considerations, in order to solve the technical problem that the BDU unit in the prior art cannot be effectively cooled, the present application provides a BDU unit, including: a shell and a heat exchange mechanism, the shell is provided with a receiving cavity for receiving electrical components, a receiving groove with an open end is provided inside the side wall of the shell and at least partially around the receiving cavity; the heat exchange mechanism is arranged in the receiving groove through the opening and contacts with the cavity wall of the receiving cavity.

[0041] In the technical solution of the embodiment of the present application, by installing the heat exchange mechanism into the receiving groove of the shell, the heat exchange mechanism and the shell for receiving electrical components form an integral structure, so that the heat exchange mechanism does not occupy additional space. The heat exchange mechanism is in contact with the cavity wall of the receiving cavity and can exchange heat with the heat generated by the electrical components in the receiving cavity, thereby greatly improving the heat exchange effect and heat exchange effect of the BDU unit.

[0042] The BDU unit of the present application can be applied to an electrical device that uses a battery as a power source or various energy storage systems that use a battery as an energy storage element.

[0043] The technical solution of the embodiments of the present application is described in detail below in conjunction with the accompanying drawings.

[0044] Please also read Figure 1 and Figure 2 An embodiment of the present application provides a BDU unit, including: a shell 1 and a heat exchange mechanism 2, the shell 1 is provided with a accommodating cavity 112 for accommodating electrical components, and a accommodating groove 100 with an open end is provided inside the side wall of the shell 1 and at least partially around the accommodating cavity 112; the heat exchange mechanism 2 is arranged in the accommodating groove 100 through the opening and contacts with the cavity wall of the accommodating cavity 112.

[0045] It can be understood that the housing 1 is a structural member that can accommodate the electrical components required for the BDU unit. In some embodiments, the side wall of the housing 1 has a double-layer structure, and the receiving groove 100 is formed inside the side wall of the double-layer structure. The opening of the receiving groove 100 is used to place the heat exchange mechanism 2 in the receiving groove 100 or remove it from the receiving groove 100, so as to facilitate the installation and removal of the heat exchange mechanism 2 and the housing 1. In some embodiments, the cavity wall of the receiving cavity 112 is also the groove wall of the receiving groove 100 close to the receiving cavity 112, so the contact between the heat exchange mechanism 2 and the cavity wall of the receiving cavity 112 can be understood as the contact between the heat exchange mechanism 2 and the groove wall of the receiving groove 100 close to the receiving cavity 112. The receiving groove 100 can be arranged around part of the receiving cavity 112, that is, the receiving groove 100 can be arranged inside part of the side wall of the housing 1. In some other embodiments, the receiving groove 100 can also be arranged circumferentially around the entire receiving cavity 112.

[0046] In the technical solution of the embodiment of the present application, by installing the heat exchange mechanism 2 into the receiving groove 100 of the shell 1, the heat exchange mechanism 2 and the shell 1 for receiving electrical components form an integral structure, so that the heat exchange mechanism 2 does not occupy additional space. The heat exchange mechanism 2 is in contact with the cavity wall of the receiving cavity 112 and can exchange heat with the heat generated by the electrical components in the receiving cavity, thereby greatly improving the heat exchange effect and heat exchange efficiency of the BDU unit, so that the BDU unit can reduce the temperature in time when the temperature is too high, thereby improving the safety and stability of the entire battery pack.

[0047] In some embodiments, please refer to Figure 2 The accommodating cavity 112 includes first cavity walls 104 arranged opposite to each other, and a plurality of heat dissipation holes 103 are arranged at intervals on the first cavity walls 104 . The heat dissipation holes 103 are used to connect the accommodating cavity 112 with the heat exchange mechanism 2 .

[0048] It can be understood that, in some embodiments, the first cavity wall 104 can be two cavity walls extending along the length direction of the accommodating cavity 112. Of course, in other embodiments, the first cavity wall 104 can also be two cavity walls extending along the width direction of the accommodating cavity 112. The heat dissipation hole 103 can be provided on the first cavity wall 104 to connect the accommodating cavity 112 and the heat exchange mechanism 2 in the accommodating tank 100, so that air can flow between the accommodating cavity 112 and the heat exchange mechanism 2.

[0049] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, on the one hand, the heat exchange mechanism 2 in the accommodating groove 100 and the electrical components in the accommodating cavity 112 can be insulated and isolated by the first cavity wall 104; on the other hand, the multiple heat dissipation holes 103 located on the first cavity wall 104 can increase the flow of air between the accommodating cavity 112 and the heat exchange mechanism 2, so that the heat generated by the electrical components can be cooled in time through the heat exchange mechanism 2, thereby improving the heat exchange efficiency.

[0050] In some embodiments, please refer to Figure 2 The heat dissipation holes 103 can be in the shape of a long strip, such as a rectangle or an ellipse. The plurality of heat dissipation holes 103 are arranged in sequence along the length direction of the first cavity wall 104, which increases the area of ​​the heat dissipation holes 103, thereby increasing the air flow rate and heat exchange rate. The interval between two adjacent heat dissipation holes 103 can insulate and isolate the heat exchange mechanism 2 from the electrical components in the accommodating cavity 112, thereby preventing the heat exchange mechanism 2 from affecting the electrical properties of the electrical components.

[0051] In some embodiments, please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 The heat exchange mechanism 2 includes: a liquid cooling plate 200, a liquid inlet 202 and a liquid outlet 201. The cross-sectional shape of the liquid cooling plate 200 is consistent with the cross-sectional shape of the receiving tank 100. The thickness of the liquid cooling plate 200 is consistent with the slot width of the receiving tank 100. A cooling medium channel 203 is provided inside the liquid cooling plate 200; the liquid inlet 202 and the liquid outlet 201 are both connected to the cooling medium channel 203.

[0052] It is understandable that the cooling medium enters the cooling medium channel 203 in the liquid cooling plate 200 from the liquid inlet 202, flows in the cooling medium channel 203, removes heat from the air, and then flows out from the liquid outlet 201. Figure 6 As shown, the cross-sectional shape of the receiving tank 100 may be consistent with the outer shape of the housing 1. In this case, the cross-sectional shape of the liquid cooling plate 200 is consistent with the cross-sectional shape of the receiving tank 100, that is, the cross-sectional shape of the liquid cooling plate 200 is consistent with the outer shape of the housing 1. Figure 3 Example shown: The shell 1 includes a first side wall arranged opposite to each other in the width direction and a second side wall arranged opposite to each other in the length direction. The second side walls are connected at both ends of the two first side walls to form a accommodating cavity 112, and the second side wall is arranged to protrude from the first side wall toward the outside of the accommodating cavity 112. Of course, in other embodiments, the first side wall and the second side wall can also form a rectangular shell. In some embodiments, the liquid inlet 202 and the liquid outlet 201 can also be connected to the cooling medium port in the battery pack case, so that the cooling medium of the cooling system of the battery pack case can enter the heat exchange mechanism 2 of the BDU unit for circulation.

[0053] In some embodiments, please refer to Figure 8 and Fig. 9 The cooling medium channels 203 inside the liquid cooling plate 200 can be provided in a plurality of interconnected channels along the height direction of the liquid cooling plate 200. Figure 7, the liquid cooling plate 200 includes a liquid cooling plate body 2003, a first end 2001 and a second end 2002, wherein the first end 2001 and the second end 2002 are arranged at intervals, that is, the first end 2001 and the second end 2002 are not connected. The liquid inlet 202 is arranged above the height direction of the liquid cooling plate 200, and the liquid outlet 201 is arranged below the height direction of the liquid cooling plate 200. The liquid inlet 202 and the liquid outlet 201 are located at the same end of the liquid cooling plate 200, such as the first end 2001, and the other end, the second end 2002, can be closed. Of course, in other embodiments, the liquid outlet 201 can also be arranged above the height direction of the liquid cooling plate 200, and the liquid inlet 202 is arranged below the height direction of the liquid cooling plate 200. In another embodiment, the liquid inlet 202 and the liquid outlet 201 can also be arranged at different ends of the liquid cooling plate 200.

[0054] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, the liquid cooling plate 200 can be directly installed in the receiving groove 100 of the shell 1 to form an integral structure with the shell 1, and at the same time, the liquid cooling plate 200 is in contact with the groove wall of the receiving groove 100, so that the cooling medium enters the cooling medium channel 203 in the liquid cooling plate 200 from the liquid inlet 202, flows in the cooling medium channel 203, takes away the heat in the air, and then flows out from the liquid outlet 201, thereby improving the heat exchange efficiency.

[0055] In some embodiments, please refer to Figure 6 The opening of the receiving groove 100 is arranged away from the opening of the receiving cavity 112 .

[0056] It is understandable that the opening of the accommodating cavity 112 is arranged upward along the height direction of the housing 1, and the opening of the accommodating tank 100 is arranged downward along the height direction of the housing 1. Thus, the liquid cooling plate 200 can be installed into the accommodating tank 100 from the lower opening to avoid affecting the electrical components in the accommodating cavity 112.

[0057] In some embodiments, please refer to Figure 6 The outer wall of the shell 1 facing away from the accommodating chamber 112 is provided with an avoidance groove 101 for avoiding the liquid inlet 202 and the liquid outlet 201. The avoidance groove 101 is connected with the accommodating groove 100, and the avoidance groove 101 also has a avoidance port 1011 connected with the opening of the accommodating groove 100.

[0058] In some embodiments, the avoidance groove 101 is open at the bottom along the height direction of the shell to form a avoidance opening 1011, and the avoidance groove 101 is also open in the direction toward the outside of the receiving tank 100. In the technical solution of the embodiment of the present application, through the above arrangement, when the liquid cooling plate 200 is installed in the receiving tank 100, the avoidance groove 101 can avoid the liquid inlet 202 and the liquid outlet 201, thereby realizing the rapid installation of the liquid cooling plate 200.

[0059] In some embodiments, please refer to Figure 6 A stopper 105 is provided at the bottom of the outer wall of the shell 1 away from the accommodating chamber 112, and a gap 106 is provided between the two sides of the stopper 105 and the outer wall of the shell 1; a stop block 1051 extends from the stopper 105 toward one side of the accommodating groove 100, and the bottom surface of the stop block 1051 is inclined upward toward the inside of the accommodating groove 100, and the top surface of the stop block 1051 is a planar structure, and the height of the liquid cooling plate 200 is consistent with the distance from the top of the accommodating groove 100 to the top surface of the stop block 1051.

[0060] It is understandable that the stopper 105 is a component used to stop the bottom of the liquid cooling plate 200 to prevent the liquid cooling plate 200 from falling out. There is a gap 106 between the two sides of the stopper 105 and the outer wall of the housing 1 so that the stopper 105 can move freely, leaving a range of movement for the stopper 105.

[0061] In the technical solution of the embodiment of the present application, through the above-mentioned arrangement, when installing the liquid cooling plate 200, the liquid cooling plate 200 can be moved from bottom to top or the shell 1 can be mounted on the liquid cooling plate 200 from top to bottom, giving a pressure to the bottom surface of the stopper 105 that is tilted upward so that it can be offset outward. After the liquid cooling plate 200 and the shell 1 are installed in place, the stopper 105 returns to its normal state. At this time, the top surface of the planar structure of the stopper 105 can be against the bottom of the liquid cooling plate 200 to prevent the liquid cooling plate 200 from falling.

[0062] In some embodiments, please refer to Figure 3 and Fig.10 The housing 1 is provided with a first mounting groove 108 for mounting the controller. The first mounting groove 108 is provided on the opening side of the housing 1 facing the accommodating cavity 112. The bottom of the first mounting groove 108 is provided with a mounting hole 1081. In some embodiments, the mounting hole 1081 may be a blind hole.

[0063] In the technical solution of the embodiment of the present application, the above arrangement is used to provide installation space for the controller so that it can be installed and fixed in the first installation groove 108. The controller used for the BDU unit adopts the existing controller, which has a boss. The boss of the controller is inserted into the installation hole 1081 to fix the controller.

[0064] In some embodiments, please refer to Fig.10 A second mounting groove 110 is also provided inside the accommodating cavity 112 , and the second mounting groove 110 is used for mounting the relay.

[0065] In some embodiments, the second mounting groove 110 may be a groove recessed in the surface of the accommodating cavity 112 .

[0066] In the technical solution of the embodiment of the present application, through the above arrangement, the relay can be confined in the second installation groove 110 , so that the relay is not easy to move in the accommodating cavity 112 .

[0067] In some embodiments, the second mounting groove 110 can be arranged close to the cavity wall of the accommodating cavity 112, so that the relay can be arranged close to the heat exchange mechanism 2, so that the heat generated by the relay can be taken away by the heat exchange mechanism 2 in time for cooling, thereby improving the heat exchange efficiency. The number of the second mounting grooves 110 can be multiple, and the multiple second mounting grooves 110 are arranged at intervals and close to the cavity wall of the accommodating cavity 112.

[0068] In some embodiments, please refer to Figure 3 and Fig.10 A copper bar connection portion 109 is provided on the first cavity wall 104 of the accommodating cavity 112. The copper bar connection portion 109 is provided close to the opening of the accommodating cavity 112 so that the copper bar in the BDU unit can be connected to the external copper bar. At the same time, the copper bar connection portion 109 provided on the first cavity wall 104 can perform heat exchange with the heat exchange mechanism 2 to improve the heat exchange efficiency.

[0069] In some embodiments, please refer to Figure 2 The BDU unit further includes: a cover body 3 , which covers the opening of the accommodating cavity 112 of the shell 1 , and a clearance groove 302 is provided at a position of the cover body 3 corresponding to the copper busbar connecting portion 109 .

[0070] In the technical solution of the embodiment of the present application, through the above arrangement, the cover body 3 covers the accommodating cavity 112 of the housing 1 to isolate the electrical components in the accommodating cavity 112 from the outside and protect the electrical components in the accommodating cavity 112. The clearance groove 302 is used for entering and exiting the copper busbar, so that the copper busbar can be exposed.

[0071] In some embodiments, please refer to Figure 2 and Figure 3 A clamping member 301 is provided on the cover body 3 , and a clamping slot 102 is provided on the shell 1 . When the cover body 3 is closed onto the shell 1 , the clamping member 301 is clamped into the clamping slot 102 .

[0072] In the technical solution of the embodiment of the present application, the clamping member 301 is clamped into the clamping slot 102 so that the cover 3 can be firmly mounted on the housing 1 to prevent the cover 3 from shifting due to factors such as vibration.

[0073] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3The housing 1 is provided with fixing holes 107 for fixing the housing 1. In some embodiments, the fixing holes 107 are provided at four bottom corners of the housing 1, so as to fix the BDU unit to a position of the battery pack case through the fixing holes 107.

[0074] The installation method of the BDU unit provided in the embodiment of the present application can be referred to as follows:

[0075] Before installation, clean the grooves and gaps of the shell 1 to prevent foreign matter from being left inside and to avoid hindering the installation of the liquid cooling plate 200. During installation, first place the liquid inlet 202 and the liquid outlet 201 of the liquid cooling plate 200 in the receiving groove 100 of the shell 1. During installation, press the shell 1 downward. During the pressing process, the stopper 105 will expand outward due to the pressure, and then as the liquid cooling plate 200 is inserted, the stopper 105 will return to its original position. Then place the clearance groove 302 of the cover 3 at the position of the copper bar connection 109, so that the copper bar can flow out. Then, when the cover 3 is pressed downward, the clamp 301 of the cover 3 will be inserted into the clamping groove 102 of the shell. At this time, the installation of the cover 3 is completed.

[0076] On the other hand, the present application also provides a battery pack, including: the BDU unit described above.

[0077] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A BDU unit, characterized in that: include: A housing (1) is provided with a receiving cavity (112) for receiving an electrical component, and a receiving groove (100) with one end open is provided inside a side wall of the housing (1) and at least partially surrounding the receiving cavity (112); The heat exchange mechanism (2) is arranged in the accommodating groove (100) through the opening and is in contact with the cavity wall of the accommodating cavity (112).

2. The BDU unit according to claim 1, characterized in that: The accommodating cavity (112) comprises first cavity walls (104) arranged opposite to each other, a plurality of heat dissipation holes (103) are arranged at intervals on the first cavity walls (104), and the heat dissipation holes (103) are used to connect the accommodating cavity (112) with the heat exchange mechanism (2).

3. The BDU unit according to claim 1 or 2, characterized in that: The heat exchange mechanism (2) comprises: A liquid cooling plate (200), wherein the cross-sectional shape of the liquid cooling plate (200) is consistent with the cross-sectional shape of the receiving groove (100), the thickness of the liquid cooling plate (200) is consistent with the groove width of the receiving groove (100), and a cooling medium channel (203) is provided inside the liquid cooling plate (200); The liquid inlet (202) and the liquid outlet (201) are both in communication with the cooling medium channel (203).

4. The BDU unit according to claim 3, characterized in that: The opening of the accommodating groove (100) is arranged away from the opening of the accommodating cavity (112), An escape groove (101) for evading the liquid inlet (202) and the liquid outlet (201) is provided on the outer side wall of the shell (1) facing away from the accommodating chamber (112); the escape groove (101) is connected to the accommodating groove (100), and the escape groove (101) also has an escape opening (1011) connected to the open opening of the accommodating groove (100).

5. The BDU unit according to claim 4, characterized in that: A stopper (105) is provided at the bottom of the outer wall of the shell (1) facing away from the accommodating cavity (112), and gaps (106) are provided between two sides of the stopper (105) and the outer wall of the shell (1); A stop block (1051) extends from the stop member (105) toward one side of the receiving groove (100); the bottom surface of the stop block (1051) is arranged to be inclined upward toward the inside of the receiving groove (100); the top surface of the stop block (1051) is a planar structure; the height of the liquid cooling plate (200) is consistent with the distance between the top of the receiving groove (100) and the top surface of the stop block (1051).

6. The BDU unit according to claim 2, characterized in that: The housing (1) is provided with a first mounting groove (108) for mounting the controller, the first mounting groove (108) being arranged on an opening side of the housing (1) facing the accommodating cavity (112), and a mounting hole (1081) being arranged at the bottom of the first mounting groove (108); A second installation groove (110) is also provided inside the accommodating cavity (112), and the second installation groove (110) is used for installing the relay; A copper busbar connection portion (109) is provided on the first cavity wall (104) of the accommodating cavity (112).

7. The BDU unit according to claim 6, characterized in that: Also includes: A cover body (3) covers the opening of the accommodating cavity (112) of the shell (1), and a clearance groove (302) is provided at a position of the cover body (3) corresponding to the copper busbar connecting portion (109).

8. The BDU unit according to claim 7, characterized in that: A clamping piece (301) is provided on the cover body (3), and a clamping slot (102) is provided on the shell (1); when the cover body (3) is covered on the shell (1), the clamping piece (301) is clamped into the clamping slot (102).

9. The BDU unit according to claim 1, characterized in that: A fixing hole (107) for fixing the shell (1) is provided on the shell (1).

10. A battery pack, characterized in that: include: The BDU unit according to any one of claims 1 to 9.

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