Shell assembly for battery pack circuit breaking unit and battery pack

Abstract

The utility model relates to the technical field of power batteries, and discloses a shell assembly for a battery pack circuit breaking unit and a battery pack, the shell assembly for the battery pack circuit breaking unit comprises a base, the bottom of the base is provided with a through hole communicated with a mounting groove, and the through hole is arranged corresponding to a mounting position of a low-voltage electrical apparatus element; a low-voltage wire harness of the low-voltage electrical apparatus element is suitable for penetrating through the through hole and being connected with an external component; according to the utility model, the bottom of the base is provided with the through hole and the first fixing piece, a low-voltage wire harness of a low-voltage electrical apparatus element in the installation groove can be directly connected with the outside through the through hole, and the first fixing piece can fix the position of the low-voltage wire harness, so that the low-voltage wire harness is prevented from being randomly drawn along the through hole; by changing the path arrangement mode of the low-voltage wire harness, the low-voltage wire harness does not need to transversely enter the mounting groove, the phenomenon that the low-voltage wire harness is close to a high-voltage overcurrent copper bar during arrangement can be effectively avoided, high-voltage and low-voltage separation is realized, and the risk of fire and explosion of the BDU assembly is reduced.

Description

Technical Field

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

[0002] The Battery Disconnect Unit (BDU) is a component in the battery pack used to control the smooth operation of the battery system's charging and discharging system. The BDU includes a variety of electrical components such as relays and fuses, as well as connecting wiring harnesses. As the requirements for the battery pack volume continue to increase, the layout space of the various components in the battery pack is becoming more and more compact.

[0003] At present, the existing BDU is usually arranged with high-voltage copper busbars and various low-voltage electrical components at the same time. The low-voltage electrical components are connected to external components through a low-voltage wiring harness that passes through the side wall of the BDU shell. Since the internal space of the BDU is usually small, the low-voltage electrical components and the high-voltage copper busbars are usually arranged compactly. When the low-voltage wiring harness passes through the internal space of the BDU horizontally or vertically to connect with the low-voltage electrical components, the gap between the low-voltage wiring harness and the high-voltage copper busbar on the path is usually small. In this type of BDU, the low-voltage wiring harness is prone to direct contact with the high-voltage copper busbar, posing a safety risk. Utility Model Content

[0004] In view of this, the utility model provides a housing assembly and a battery pack for a battery pack disconnect unit to solve the problem of safety risks in the existing BDU layout.

[0005] In the first aspect, the utility model provides a shell assembly for a battery pack circuit breaker unit, including: a base, having an upwardly opened mounting groove, the mounting groove having a mounting position inside, the mounting position being used to install a high-voltage current copper bus and a low-voltage electrical component, a through hole connected to the mounting groove being provided at the bottom of the base, the through hole being arranged corresponding to the mounting position of the low-voltage electrical component, the low-voltage wiring harness of the low-voltage electrical component being suitable for passing through the through hole and being connected to an external component; a first fixing member being arranged at the bottom of the base, the first fixing member being used to fix the low-voltage wiring harness.

[0006] Beneficial effect: a through hole and a first fixing part are arranged at the bottom of the base, and the low-voltage wiring harness of the low-voltage electrical components inside the installation groove can be directly connected to the outside through the through hole. The first fixing part can fix the position of the low-voltage wiring harness to prevent the low-voltage wiring harness from being randomly pulled along the through hole. By changing the path layout of the low-voltage wiring harness, the low-voltage wiring harness does not need to cross into the installation groove, which can effectively avoid the phenomenon that the low-voltage wiring harness is arranged close to the high-voltage current copper bus, realizes the separation of high and low voltage, reduces the risk of fire and explosion of BDU components, and effectively solves the problem of safety risks in the existing BDU layout.

[0007] In an optional embodiment, the bottom of the base also has a downwardly opened accommodating groove, the mounting groove is connected to the accommodating groove through a through hole, the first fixing piece is arranged on the top wall of the accommodating groove, and the side wall of the accommodating groove is provided with an opening for the low-voltage wiring harness to pass through, and the base is suitable for forming an accommodating cavity by enclosing the accommodating groove and the box body of the battery pack.

[0008] Beneficial effect: The installation groove and the receiving groove are separated by the bottom surface of the base to form two independent spaces. The receiving groove can protect and restrain the low-voltage wiring harness, prevent external parts from contacting the low-voltage wiring harness at will, and ensure the layout reliability of the low-voltage wiring harness.

[0009] In an optional embodiment, the first fixing member is detachably arranged at the bottom of the base, and / or the first fixing member is a cable tie.

[0010] Beneficial effects: The first fixing piece can be matched with the low-voltage wiring harness in advance and assembled together with the low-voltage wiring harness. When inspection and maintenance are required, the first fixing piece can also be easily disassembled together with the corresponding low-voltage wiring harness, which is convenient for disassembly and assembly. In addition, the cable tie can flexibly match wiring harnesses of various sizes without the need for separate design and manufacturing.

[0011] In an optional embodiment, the housing assembly for the battery pack circuit breaker unit further includes an upper cover and a second fixing member, wherein the upper cover is detachably disposed on the top of the base, and the second fixing member is disposed on the outer wall of the upper cover, and the second fixing member is suitable for fixing an external wiring harness.

[0012] Beneficial effect: Through a simple and reliable structure, the external wiring harness passing through the upper cover can be restrained and fixed, preventing the wiring harness in the battery pack from moving randomly and frequently rubbing against surrounding components when the vehicle is in driving state.

[0013] In an optional embodiment, the housing assembly for the battery pack disconnecting unit further includes a moving part, and the second fixing part is movably disposed on the top of the upper cover via the moving part.

[0014] Beneficial effect: The second fixing part can flexibly adjust its position through the moving part, which can improve the flexibility of use.

[0015] In an optional embodiment, the second fixing member is detachably connected to the movable member, and / or the second fixing member is a cable tie.

[0016] Beneficial effects: When the second fixing part is damaged, the second fixing part can be removed from the moving part and replaced, which can improve the convenience of inspection and maintenance. The cable tie can be flexibly matched with wire harnesses of various sizes without the need for separate design and manufacturing.

[0017] In an optional embodiment, a guide structure is provided on the top of the upper cover, and the moving member cooperates with the guide structure and can move along the extension direction of the guide structure.

[0018] Beneficial effect: The guide structure can constrain the moving range and moving trajectory of the moving part, thereby improving the reliability of the moving part's adjustable movement.

[0019] In an optional embodiment, the guide structure is a guide groove arranged on the top of the upper cover, the movable member is a slider, and a disassembly opening is formed at one end of the guide groove, and the movable member enters or leaves the guide groove through the disassembly opening.

[0020] Beneficial effects: This kind of guide structure is simple and reliable, and is easy to process and manufacture.

[0021] In an optional embodiment, the housing assembly for the battery pack circuit breaker unit further includes a locking-matching limit member and a locking member, wherein the limit member is movably disposed in the guide groove, and the locking member has an unlocked state that allows the limit member to move in the guide groove, and a locked state that fixes the limit member to the guide groove, and the limit member is suitable for limiting the sliding range of the movable member in the guide groove.

[0022] Beneficial effect: The limiting part and the locking part cooperate to restrict the disassembly and assembly opening, preventing the moving part from continuously moving and escaping from the disassembly and assembly opening.

[0023] In a second aspect, the utility model further provides a battery pack, which comprises: a box body; a battery cell assembly installed inside the box body; and the above-mentioned shell assembly for the battery pack disconnecting unit, which is assembled and connected to the box body via a fastening component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a front view of a housing assembly for a battery pack disconnect unit according to an embodiment of the utility model;

[0026] Figure 2 for Figure 1 A bottom view of a housing assembly for a battery pack disconnect unit is shown;

[0027] Figure 3 for Figure 1 A side view of a housing assembly for a battery pack disconnect unit is shown;

[0028] Figure 4 for Figure 1 A top view of a housing assembly for a battery pack disconnect unit is shown;

[0029] Figure 5 for Figure 4 Sectional view of DD';

[0030] Figure 6 for Figure 1 A three-dimensional schematic diagram of a housing assembly for a battery pack disconnect unit is shown;

[0031] Figure 7 for Figure 6 An enlarged schematic diagram of position A of a housing assembly for a battery pack disconnect unit is shown;

[0032] Figure 8 for Figure 6 An enlarged schematic diagram of point B of the housing assembly for a battery pack disconnect unit is shown.

[0033] Description of reference numerals:

[0034] 1. Base; 101. Through hole; 102. Accommodation slot; 103. Opening; 104. Low-voltage wiring harness; 105. Mounting slot;

[0035] 2. Upper cover; 201. Guide groove; 202. Disassembly opening;

[0036] 3. First fixing member; 4. Second fixing member; 5. Sliding block; 6. Limiting member; 7. Locking member; 8. Fastening member; 9. Sealing connecting member. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0038] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0039] In the related art, since the BDU is internally arranged and installed with high-voltage copper busbars, various low-voltage electrical components and related low-voltage wiring harnesses, the space inside the BDU is relatively compact, and it is usually difficult to set fixed components inside the BDU to fix each corresponding low-voltage wiring harness. During operation, since the low-voltage wiring harness crosses the space inside the BDU and is not effectively restrained, there is a possibility that the low-voltage wiring harness will come into contact with the high-voltage copper busbar due to bumps or shaking, which can easily cause electrical fires and explosions, posing a potential major safety hazard.

[0040] According to an embodiment of the utility model, on the one hand, a shell assembly for a battery pack circuit breaker unit is provided, including: a base 1 and a first fixing member 3, the base 1 has an upwardly opened mounting groove 105, the mounting groove 105 has a mounting position inside, the mounting position is used to install a high-voltage current copper bus and a low-voltage electrical component, the bottom of the base 1 is provided with a through hole 101 connected to the mounting groove 105, the through hole 101 is arranged corresponding to the mounting position of the low-voltage electrical component, the low-voltage wiring harness 104 of the low-voltage electrical component is suitable for passing through the through hole 101 and connecting with external components, the first fixing member 3 is arranged at the bottom of the base 1, and the first fixing member 3 is used to fix the low-voltage wiring harness 104.

[0041] The shell assembly for the battery pack circuit breaker unit of the present embodiment is applied, and a through hole 101 and a first fixing member 3 are set at the bottom of the base 1. The low-voltage wiring harness 104 of the low-voltage electrical component inside the installation groove 105 can be directly connected to the outside through the through hole 101. The first fixing member 3 can fix the position of the low-voltage wiring harness 104 to prevent the low-voltage wiring harness 104 from being twitched along the through hole 101 at will. By changing the path layout of the low-voltage wiring harness 104, the low-voltage wiring harness 104 does not need to cross into the installation groove 105, which can effectively avoid the phenomenon that the low-voltage wiring harness 104 is arranged close to the high-voltage current copper bus, thereby realizing high and low voltage separation, reducing the risk of fire and explosion of the BDU component, and effectively solving the problem of safety risks in the existing BDU layout.

[0042] It should be noted that, in this embodiment, the bottom of the base 1 refers to the base 1 along the Figure 1 The area on the "downward" side pointed by the middle arrow.

[0043] Specifically, the low-voltage wiring harness 104 includes but is not limited to an electrical component communication wiring harness, a voltage collection wiring harness, a current collection wiring harness, a relay drive wiring harness, and the like.

[0044] Furthermore, there is no limitation on the setting position, specification and size, and extension direction of the through hole 101. The position of the through hole 101 can be matched according to the setting position of the low-voltage electrical component, and the specification and size of the through hole 101 correspond to the specification and size of the low-voltage wiring harness 104 to be passed through. The extension direction of the through hole 101 can be along the vertical extension or along a preset direction in the horizontal plane. It can be flexibly selected according to needs, as long as the low-voltage wiring harness 104 can be reliably passed through.

[0045] It should be noted that vertical refers to Figure 1 The arrow in the middle points to the "up and down" direction, and the horizontal plane refers to the Figure 1 The "up and down" direction indicated by the arrow is perpendicular to the plane.

[0046] In addition, there is no limitation on the specific type of the first fixing member 3 , and it may be a fixing member in the form of a cable tie, a buckle, a clamp, etc., which can be flexibly selected according to needs.

[0047] In this embodiment, the bottom of the base 1 also has a downwardly opened receiving groove 102, the installation groove 105 is connected with the receiving groove 102 through the through hole 101, the first fixing member 3 is arranged on the top wall of the receiving groove 102, and the side wall of the receiving groove 102 is provided with an opening 103 for the low-voltage wiring harness 104 to pass through. The base 1 is suitable for forming a receiving cavity through the receiving groove 102 and the box body of the battery pack. The low-voltage wiring harness 104 passes through the installation groove 105 and is arranged in the receiving groove 102. The opening 103 facilitates the connection of the low-voltage wiring harness 104 with external components. The installation groove 105 and the receiving groove 102 are separated by the bottom surface of the base 1 to form two independent spaces. The receiving groove 102 can protect and restrain the low-voltage wiring harness 104 to prevent external parts from contacting the low-voltage wiring harness 104 at will, thereby ensuring the reliability of the arrangement of the low-voltage wiring harness 104.

[0048] It should be noted that, in this embodiment, the top wall of the receiving groove 102 refers to the top wall of the receiving groove 102 along the Figure 1 The wall on the "up" side pointed by the middle arrow.

[0049] In this embodiment, the first fixing member 3 is detachably arranged at the bottom of the base 1. The first fixing member 3 can be matched with the low-voltage wiring harness 104 in advance and assembled together with the low-voltage wiring harness 104. When inspection and maintenance are required, the first fixing member 3 can also be easily disassembled together with the corresponding low-voltage wiring harness 104, which is convenient for disassembly and assembly.

[0050] In addition, the bottom of the base 1 may be provided with a plurality of positions for installing the first fixing member 3. Since the first fixing member 3 is detachable, its position can be flexibly adjusted, so it can adapt to a variety of restraint fixing methods of the low-voltage wiring harness 104, which can enhance the fixing flexibility.

[0051] In this embodiment, the first fixing member 3 is a cable tie, which has a simple and reliable structure and is easy to use. The cable tie can be flexibly matched with wire harnesses of various sizes without the need for separate design and manufacturing.

[0052] Preferably, the first fixing member 3 is a fir-tree type tie.

[0053] In the present embodiment, the shell assembly for the battery pack circuit breaker unit also includes an upper cover 2 and a second fixing member 4. The upper cover 2 is detachably arranged on the top of the base 1, and the second fixing member 4 is arranged on the outer wall of the upper cover 2. The second fixing member 4 is suitable for fixing the external wiring harness. This form of the shell assembly for the battery pack circuit breaker unit integrates the second fixing member 4 into the upper cover 2. Through a simple and reliable structure, the external wiring harness passing through the upper cover 2 can be constrained and fixed, which can solve the problem that the wiring harness in the battery pack can move freely when driving, and frequently rubs against surrounding components, which can easily scratch the surface of the wiring harness and cause poor contact, or fail to collect information of a certain string of batteries.

[0054] Specifically, there is no specific limitation on the setting position and number of the second fixing parts 4. The second fixing parts 4 can be set on the side walls and the top surface of the upper cover 2. The number of the second fixing parts 4 can be one, two, three or more, which can be selected according to the layout position of the surrounding wiring harness and the constraint requirements.

[0055] Furthermore, if Figure 6 As shown, in order to better seal the installation groove 105 and protect the internal components, the upper cover 2 is sealed and connected to the base 1 through a plurality of sealing connectors 9. The upper cover 2 is provided with sealing connection holes for the sealing connectors 9 to pass through, and the base 1 is provided with sealing matching holes that match the sealing connectors 9.

[0056] Preferably, the sealing connection member 9 is a sealing bolt.

[0057] In this embodiment, the shell assembly for the battery pack disconnecting unit also includes a movable part, and the second fixing part 4 is movably arranged on the top of the upper cover 2 through the movable part. The second fixing part 4 can flexibly adjust its own position through the movable part, which can improve the flexibility of use.

[0058] Specifically, there is no limitation on the moving mode of the moving part, which may be direct surface-to-surface sliding or sliding through rollers or the like.

[0059] In this embodiment, the second fixing member 4 is detachably connected to the movable member. When the second fixing member 4 is damaged, the second fixing member 4 can be removed from the movable member, replaced, and then reinstalled without replacing the movable member, which can effectively improve the convenience of inspection and maintenance.

[0060] There is no limitation on the specific type of the second fixing member 4 , and it may be a fixing member in the form of a cable tie, a buckle, a clamp, etc., which can be flexibly selected according to the needs.

[0061] In this embodiment, the second fixing member 4 is a cable tie, which has a simple and reliable structure and is easy to use. The cable tie can be flexibly matched with wire harnesses of various sizes without the need for separate design and manufacturing.

[0062] Preferably, the second fixing member 4 is a fir-tree type tie.

[0063] Among them, Figure 7 As shown, the bottom of the fir-tree type cable tie has a screw structure, and the top of the movable part is correspondingly provided with a screw hole. The fir-tree type cable tie can be assembled by screwing the screw structure into the screw hole.

[0064] In this embodiment, a guide structure is provided on the top of the upper cover 2, and the moving part cooperates with the guide structure and can move along the extension direction of the guide structure. The guide structure can constrain the moving range and moving trajectory of the moving part, thereby improving the reliability of the adjustment movement of the moving part.

[0065] There is no limitation on the specific types of the moving part and the guiding structure. The moving part may be a slider with a slide groove, and the guiding structure may be a guide rail structure. The moving part may also be a slider, and the guiding structure may be a slide groove.

[0066] In this embodiment, the guide structure is a guide groove 201 arranged on the top of the upper cover 2, the movable member is a slider 5, and one end of the guide groove 201 forms a disassembly opening 202. The movable member enters or leaves the guide groove 201 through the disassembly opening 202. This guide structure is simple and reliable and easy to process and manufacture.

[0067] Specifically, Figure 4 As shown, the guide groove 201 is a groove body extending along a straight line. It can be understood that, as an alternative embodiment, the guide groove 201 can also be a broken line groove body connected in multiple sections, or a continuously changing curved groove body, which can be selected according to the position of the external wiring harness and the adjustable range of the movable part.

[0068] In this embodiment, the shell assembly for the battery pack disconnecting unit also includes a locking member 6 and a locking member 7. The limit member 6 is movably arranged in the guide groove 201. The locking member 7 has an unlocking state that allows the limit member 6 to move in the guide groove 201, and a locking state that fixes the limit member 6 to the guide groove 201. The limit member 6 is suitable for limiting the sliding range of the moving part in the guide groove 201. The limit member 6 and the locking member 7 cooperate to limit the disassembly and assembly port 202 to prevent the moving part from continuing to move and escaping from the disassembly and assembly port 202. At the same time, by increasing the number of groups of the limit member 6 and the locking member 7, the limit members 6 are respectively provided on both sides of a single moving part, so that the position of one of the moving parts can be individually limited, thereby improving the working reliability of the moving part and the flexibility of position fixing.

[0069] Specifically, Figure 8As shown, the limit member 6 is a limit block that can slide in the guide groove 201, and the locking member 7 is a limit bolt passed through the top of the limit member 6. The locking effect can be achieved by abutting the limit member 6 against the bottom surface of the guide groove 201 or inserting it into the positioning hole on the bottom surface of the guide groove 201.

[0070] It can be understood that, as a replaceable embodiment, the limiting member 6 may not be provided and a locking member 7 may be provided separately, and a hole for installing the locking member 7 may be provided at the disassembly and assembly port 202 . The disassembly and assembly port 202 can be blocked by the locking member 7 to prevent the moving part from escaping from the disassembly and assembly port 202 .

[0071] According to an embodiment of the present utility model, on the other hand, a battery pack is provided, which includes: a case body, a battery cell assembly and the above-mentioned shell assembly for the battery pack disconnecting unit, the battery cell assembly is installed inside the case body, and the shell assembly for the battery pack disconnecting unit is assembled and connected to the case body through a fastening component 8.

[0072] In this embodiment, the battery pack also includes other necessary components such as battery cell units, expansion beams, and control components.

[0073] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A housing assembly for a battery pack disconnect unit, characterized in that: include: A base (1) has an upwardly opening mounting groove (105), the mounting groove (105) has a mounting position inside, the mounting position is used to mount a high-voltage copper busbar and a low-voltage electrical component, the bottom of the base (1) is provided with a through hole (101) connected to the mounting groove (105), the through hole (101) is arranged corresponding to the mounting position of the low-voltage electrical component, and the low-voltage wire harness (104) of the low-voltage electrical component is suitable for passing through the through hole (101) and connecting with an external component; A first fixing member (3) is arranged at the bottom of the base (1), and the first fixing member (3) is used to fix the low-voltage wire harness (104).

2. The housing assembly for the battery pack disconnect unit according to claim 1, characterized in that: The bottom of the base (1) also has a receiving groove (102) opened downward, the installation groove (105) is connected to the receiving groove (102) through the through hole (101), the first fixing member (3) is arranged on the top wall of the receiving groove (102), and the side wall of the receiving groove (102) is provided with an opening (103) for the low-voltage wiring harness (104) to pass through, and the base (1) is suitable for forming a receiving cavity by enclosing the receiving groove (102) and the box body of the battery pack.

3. The housing assembly for the battery pack disconnect unit according to claim 1, characterized in that: The first fixing member (3) is detachably arranged at the bottom of the base (1). And / or, the first fixing member (3) is a cable tie.

4. The housing assembly for a battery pack disconnect unit according to any one of claims 1 to 3, characterized in that: The housing assembly further comprises an upper cover (2) and a second fixing member (4), wherein the upper cover (2) is detachably arranged on the top of the base (1), and the second fixing member (4) is arranged on the outer wall of the upper cover (2), and the second fixing member (4) is suitable for fixing an external wiring harness.

5. The housing assembly for the battery pack disconnect unit according to claim 4, characterized in that: The housing assembly also includes a moving part, and the second fixing part (4) is movably arranged on the top of the upper cover (2) through the moving part.

6. The housing assembly for the battery pack disconnect unit according to claim 5, characterized in that: The second fixing member (4) is detachably connected to the moving member. And / or, the second fixing member (4) is a cable tie.

7. The housing assembly for the battery pack disconnect unit according to claim 5, characterized in that: A guide structure is provided on the top of the upper cover (2), and the moving member cooperates with the guide structure and can move along the extension direction of the guide structure.

8. The housing assembly for the battery pack disconnect unit according to claim 7, characterized in that: The guide structure is a guide groove (201) arranged on the top of the upper cover (2); the movable member is a slider (5); one end of the guide groove (201) forms a disassembly opening (202); and the movable member enters or leaves the guide groove (201) through the disassembly opening (202).

9. The housing assembly for the battery pack disconnect unit according to claim 8, characterized in that: The housing assembly further comprises a locking member (6) and a locking member (7), wherein the limiting member (6) is movably arranged in the guide groove (201), and the locking member (7) has an unlocking state in which the limiting member (6) can move in the guide groove (201), and a locking state in which the limiting member (6) is fixed to the guide groove (201), and the limiting member (6) is suitable for limiting the sliding range of the movable member in the guide groove (201).

10. A battery pack, characterized in that: include: Box; A battery cell assembly is installed inside the box; The housing assembly for a battery pack disconnect unit according to any one of claims 1 to 9 is assembled and connected to the box body via a fastening component (8).

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