Battery pack and automobile

Abstract

A battery pack (100) and an automobile. The battery pack (100) comprises: a battery tray (10) and a battery wire harness (20); the battery tray (10) is provided with structural beams (11), the structural beams (11) being provided with accommodating ducts (105); the battery wire harness (20) is accommodated in the accommodating ducts (105) and is insulated from the structural beams (11).

Description

Battery packs and cars

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202321995141.2 and application date of July 26, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of automobile technology, and in particular, to a battery pack and an automobile. Background Art

[0004] The battery pack contains a battery wiring harness, which typically includes high-voltage and low-voltage wiring harnesses, respectively, used for current consolidation and sampling of the battery modules within the pack. The wiring harnesses are tangled, and if a battery module experiences thermal runaway, this can adversely affect the entire harness, compromising monitoring of the battery module's operation.

[0005] Summary of the Invention

[0006] One purpose of the application is to provide a new technical solution for a battery pack and a vehicle, thereby reducing the adverse effects of thermal runaway of the battery module on the battery wiring harness.

[0007] According to a first aspect of the present application, a battery pack is provided, comprising: a battery tray and a battery wiring harness; the battery tray has a structural beam, the structural beam has a receiving groove, the battery wiring harness is received in the receiving groove and is insulated from the structural beam.

[0008] In the present application, the battery pack further includes a container, the battery wiring harness is accommodated in the container, the container is accommodated in the accommodating groove, the container is a groove-shaped component, and the opening side of the container and the opening side of the accommodating groove face the same direction.

[0009] In the present application, the battery wiring harness includes a high-voltage wire bus, the accommodation member includes a wire bus accommodation member, the high-voltage wire bus is accommodated in the wire bus accommodation member, and the wire bus accommodation member is accommodated in the accommodation groove.

[0010] In the present application, the battery wiring harness includes a low-voltage wiring harness, the accommodating member includes a low-voltage wire accommodating member, the sampling bus is accommodated in the low-voltage wire accommodating member, and the low-voltage wire accommodating member is accommodated in the accommodating groove.

[0011] In the present application, the low-voltage wiring harness includes a sampling bus, which includes a plurality of sampling wires and an insulation layer, and the plurality of sampling wires are wrapped together by the insulation layer.

[0012] In the present application, the battery wiring harness includes a high-voltage wire bus and a low-voltage wire harness, and the battery pack also includes a wire bus accommodating part and a low-voltage wire accommodating part. The high-voltage wire bus is accommodated in the wire bus accommodating part, and the low-voltage wire harness is accommodated in the low-voltage wire accommodating part. The wire bus accommodating part and the low-voltage wire accommodating part are both accommodated in the accommodating groove. The wire bus accommodating part and the low-voltage wire accommodating part are both groove-shaped parts. The opening side of the wire bus accommodating part, the opening side of the low-voltage wire accommodating part and the opening side of the accommodating groove face the same direction, and the bottom wall of the low-voltage wire accommodating part closes the opening side of the wire bus accommodating part.

[0013] In the present application, the structural beam has reinforcing ribs, and the reinforcing ribs support the wire row accommodating member so that a space exists between the wire row accommodating member and the bottom of the structural beam.

[0014] In the present application, the sampling bus has a plurality of sampling connectors, and the low-voltage line accommodating member has a plurality of first bayonet ports, which are engaged with the sampling lines so that the sampling connectors are located outside the low-voltage line accommodating member.

[0015] In the present application, the battery pack also includes a battery module, and the sampling connector includes a sampling nickel sheet and a quick-plug connector. The sampling nickel sheet is connected to the connecting sheet of the battery module, and the quick-plug connector is plugged into the sampling adapter harness plug of the battery module.

[0016] In the present application, the receiving slot is provided with a second bayonet, and the second bayonet overlaps with the first bayonet.

[0017] In the present application, the structural beam includes a pallet longitudinal beam and a pallet cross beam, the pallet longitudinal beam or the pallet cross beam has a receiving groove, the pallet longitudinal beam is connected to the pallet cross beam, and the longitudinal or transverse distance from at least one of the second latches to the connection between the pallet longitudinal beam and the pallet cross beam is less than a first threshold.

[0018] According to a second aspect of the present application, a car is also provided, which is equipped with the battery pack as described above.

[0019] The beneficial effect of the present application is that by accommodating the battery wiring harness in the accommodating groove of the structural beam, the battery wiring harness is at least partially isolated from the battery module in the battery accommodating space, thereby reducing the adverse effects on the entire battery wiring harness when thermal runaway of the battery module occurs.

[0020] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] FIG1 is an exploded view of a battery pack according to an embodiment of the present application.

[0023] FIG2 is a perspective view of a sampling bus according to an embodiment of the present application.

[0024] FIG. 3 is a perspective view of a low-voltage line accommodation member according to an embodiment of the present application.

[0025] FIG4 is a partially enlarged view of the battery pack according to an embodiment of the present application.

[0026] FIG5 is a partial enlarged view of the battery pack at another position according to an embodiment of the present application;

[0027] FIG6 is a schematic structural diagram of a battery harness installed in a structural beam according to an embodiment of the present application;

[0028] FIG7 is a schematic diagram showing the positional relationship between the second latch and the pallet cross beam and the pallet longitudinal beam in an embodiment of the present application.

[0029] Reference numerals:

[0030] Battery pack 100; battery tray 10; structural beam 11; battery wiring harness 20; accommodating member 30; transverse side beam 101; longitudinal side beam 102; battery accommodating space 103; tray longitudinal beam 104; reinforcing rib 1041; bottom 1042; accommodating groove 105; high-voltage wire bus 106; wire bus accommodating member 107; low-voltage wire harness 108; sampling line 1081; sampling nickel sheet 1082; quick-plug connector 1083; sampling bus 1084; insulating layer 1085; sampling connector 1086; low-voltage wire harness accommodating member 109; first bayonet 1091; tray crossbeam 110; front distribution box 111; rear distribution box 112; battery module 113; connecting piece 1131; sampling adapter harness plug 1132; second bayonet 114. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] In the following description, the “longitudinal” direction represents the length direction of the car, and the “transverse” direction represents the width direction of the car.

[0037] 1 and 4 , an embodiment of the present application provides a battery pack 100 comprising: a battery tray 10 and a battery harness 20. The battery tray 10 has a battery accommodation space 103 for accommodating battery modules; the battery tray 10 has a structural beam 11, and the structural beam 11 comprises a tray longitudinal beam 104, a tray cross beam 110, a transverse side beam 101 and a longitudinal side beam 102. In the following description, the tray longitudinal beam 104 is described as an example of the structural beam 11, but other beam components such as the tray cross beam 110, the transverse side beam 101 and the longitudinal side beam 102 can have the same structure as the tray longitudinal beam 104, such as having a receiving groove 105, etc., and the battery harness 20 can be installed in these beam components in the same manner. The tray longitudinal beam 104 has a receiving groove 105, and the battery harness 20 is accommodated in the receiving groove 105 and is insulated from the tray longitudinal beam 104. In Figure 1, the battery tray 10 includes a pair of transverse side beams 101 and a pair of longitudinal side beams 102, and the transverse side beams 101 and the longitudinal side beams 102 are connected together to form a frame structure. However, the present application can also adopt an integrally cast or integrally stamped battery tray 10 structure. Since the battery wiring harness 20 is accommodated in the receiving groove 105 of the tray longitudinal beam 104 and is insulated from the tray longitudinal beam 104, most of the battery wiring harness 20 can be protected by the structural beam 11. When the battery module in the battery accommodating space 103 thermally runs away, the adverse effects on the battery wiring harness 20 are reduced. Similarly, the battery wiring harness 20 is accommodated in the receiving groove 105 of other structural beams 11, such as the tray cross beam 110, which can also reduce the adverse effects of thermal runaway of the battery module on the battery module.

[0038] The battery wiring harness 20 can be directly accommodated in the accommodating groove 105, or it can be first accommodated in an accommodating member 30 (such as the wire array accommodating member 107 or the low-voltage wiring harness accommodating member 109 described below), and then the accommodating member 30 is accommodated in the accommodating groove 105. The accommodating member 30 can be a groove-shaped member, with the open side of the accommodating member 30 facing the same direction as the open side of the accommodating groove.

[0039] According to one embodiment of the present application, the battery wiring harness 20 includes a high-voltage wire bus 106, and the container 30 includes a wire bus container 107. The high-voltage wire bus 106 includes conductors such as copper and aluminum, and is used to make high-voltage electrical connections with the battery module, such as the busbars of each battery module. The copper, aluminum and other conductors in the high-voltage wire bus 106 can be wrapped with an insulating film on the outside. The wire bus container 107 is preferably made of an insulating material. In the case where the high-voltage wire bus 106 itself has an insulating layer 1085, the wire bus container 107 can also be made of a non-insulating material. The high-voltage wire bus 106 is accommodated in the wire bus container 107, and then the wire bus container 107 is accommodated in the accommodating groove 105, thereby achieving electrical insulation between the high-voltage wire bus 106 and the structural beam 11, and the high-voltage wire bus 106 will be doubly protected by the wire bus container 107 and the structural beam 11, further reducing the adverse effects of thermal runaway.

[0040] The wire row accommodating member 107 can be a groove-shaped member or a tubular member. Preferably, the wire row accommodating member 107 is a groove-shaped member. As a "groove" type structure, there must be four sides, namely two opposite side walls, a bottom wall and an open side. Whether the two ends of the "groove" type structure are open is not limited in this application. As can be seen from Figure 6, the open side of the wire row accommodating member 107 and the open side of the accommodating groove 105 of the tray longitudinal beam 104 face the same direction, that is, both open sides face upward as shown in Figure 6. The advantage of this structure is that when the battery pack is assembled, the wire row accommodating member 107 can be first installed into the accommodating groove 105 from the open side of the accommodating groove 105, and then the high-voltage wire bus 106 can be installed into the wire row accommodating member 107 from the open side of the wire row accommodating member 107, which is convenient for assembly.

[0041] According to one embodiment of the present application, referring to FIG2 , the battery wiring harness 20 includes a low-voltage wiring harness 108 , which includes a sampling bus 1084 . The sampling bus 1084 includes multiple sampling lines 1081 and an insulation layer 1085 , and the multiple sampling lines 1081 are wrapped together by the insulation layer 1085 . The low-voltage wiring harness can also include other signal lines. In this article, wrapping does not mean completely wrapping, but rather allows each sampling connector 1086 of each sampling line 1081 to be connected to a device other than the sampling bus 1084 . This structure of the sampling bus 1084 can avoid wiring confusion.

[0042] According to one embodiment of the present application, referring to FIG3 , the container 30 includes a low-voltage wire container 109 . A sampling bus 1084 is housed within the low-voltage wire container 109 , which is then housed within the receiving slot 105 . Thus, the pallet stringer 104 and the low-voltage wire container 109 provide dual protection for the low-voltage wiring harness, further mitigating the adverse effects of thermal runaway. The sampling bus 1084 is electrically isolated from the pallet stringer 104 by its own insulation layer 1085 . The low-voltage wire container 109 can be manufactured from either insulating or non-insulating materials.

[0043] Similar to the wire row accommodating member 107, the low-voltage wire accommodating member 109 can be a groove-shaped member or a tubular member. Preferably, the low-voltage wire accommodating member 109 is a groove-shaped member. As can be seen from Figure 6, the open side of the low-voltage wire accommodating member 109 and the open side of the accommodating groove 105 of the tray longitudinal beam 104 face the same direction, that is, both open sides face upward as shown in Figure 6. The advantage of this structure is that when the battery pack is assembled, the low-voltage wire accommodating member 109 can be first installed into the accommodating groove 105 from the open side of the accommodating groove 105, and then the low-voltage wiring harness, such as the sampling bus 1084, can be installed into the wire row accommodating member 107 from the open side of the low-voltage wire accommodating member 109, which is convenient for assembly.

[0044] According to one embodiment of the present application, as can be seen from FIG6 , as an optional solution, the battery wiring harness 20 includes both a high-voltage wire row 106 and a low-voltage wire harness (e.g., a sampling bus 1084). Accordingly, the accommodating member 30 includes a wire row accommodating member 107 and a low-voltage wire accommodating member 109. The wire row accommodating member 107 and the low-voltage wire accommodating member 109 are both accommodated in the accommodating groove 105 of the pallet longitudinal beam 104. The wire row accommodating member 107 and the low-voltage wire accommodating member 109 are both groove-shaped members, and the open side of the wire row accommodating member 107, the open side of the low-voltage wire accommodating member 109, and the open side of the accommodating groove 105 of the pallet longitudinal beam 104 face the same direction, that is, the three open sides are all facing upward as shown in FIG6 , and the bottom wall of the low-voltage wire accommodating member 109 closes the open side of the wire row accommodating member 107. The advantage of this structure is that, from the perspective of assembly, the line row container 107 can be first installed into the accommodating groove 105 from the open side of the accommodating groove 105, and then the high-voltage line bus 106 can be installed into the line row container 107 from the open side of the line row container 107, and then the low-voltage line container 109 can be installed into the accommodating groove 105 from the open side of the accommodating groove 105, and finally the low-voltage wire harness, such as the sampling bus 1084, can be installed into the line row container 107 from the open side of the low-voltage line container 109. All assembly is carried out from top to bottom, which is convenient for assembly. From the perspective of protecting the wiring harness, this structure uses the bottom wall of the low-voltage line container 109 to close the open side of the line row container 107, so the high-voltage line bus 106, which is more sensitive to the risk of thermal runaway, is more strongly protected, and the protection effect of the entire structure for high and low voltage wiring harnesses is more reasonable.

[0045] According to one embodiment of the present application, as can be seen in FIG6 , the tray longitudinal beam 104 has reinforcing ribs 1041. The reinforcing ribs 1041 not only reinforce the structure of the tray longitudinal beam 104 but also support the cable accommodating member 107, thereby ensuring a gap between the cable accommodating member 107 and the bottom 1042 of the tray longitudinal beam 104. This prevents the high-voltage cable 106 and the low-voltage wiring harness from falling too deep into the accommodating groove 105, thereby preventing the battery wiring harness 20 from being excessively bent.

[0046] According to one embodiment of the present application, as shown in FIG2 , the sampling bus 1084 has multiple sampling connectors 1086 , each comprising a sampling nickel sheet 1082 and a quick-connect connector 1083 . As shown in FIG3 , the low-voltage line accommodating member 109 has multiple first bayonet openings 1091 . The sampling connectors 1086 , comprising the sampling nickel sheet 1082 and the quick-connect connector 1083 , extend from the open side 1091 . Thus, each sampling line 1081 engages with the first bayonet openings 1091 , positioning the sampling connectors 1086 outside the low-voltage line accommodating member 109 . The first bayonet openings 1091 can be sealed with a sealant.

[0047] The low-voltage line accommodating member 109 and the line row accommodating member 107 can both be formed by extrusion of composite materials, which is simple to manufacture. The low-voltage line accommodating member 109 and the line row accommodating member 107 can also be formed by bending or stamping a plate.

[0048] The tray longitudinal beam 104 or other structural beams 11 can be formed by extrusion, bending a plate, or molding. The open side of the receiving groove 105 is formed at the top of the structural beam 11, that is, the open side of the receiving groove 105 faces upward, which facilitates the arrangement of the battery wiring harness 20.

[0049] As can be seen from Figure 1, the battery tray 10 also includes a tray crossbeam 110, and the tray longitudinal beam 104 intersects with the tray crossbeam 110, thereby dividing the battery tray 10 into a plurality of battery accommodating spaces 103. The tray longitudinal beam 104 and the tray crossbeam 103 can jointly improve the structural strength of the battery tray 10. As mentioned above, the tray crossbeam 110 can also form a receiving groove 105 and accommodate the battery wiring harness 20. In conjunction with Figures 1 and 6, the receiving groove 105 is provided with a second bayonet 114, and the second bayonet 114 overlaps with the first bayonet 1091, so that each sampling head of the sampling line 1081 can smoothly pass through the first bayonet 1091 and the second bayonet 114 to reach the required sampling position.

[0050] According to one embodiment of the present application, referring to FIG7 , a longitudinal distance D between at least one second latch 114 and the connection between the pallet longitudinal beam 104 and the pallet cross beam 110 is less than a first threshold. This first threshold can be 2 cm, 3 cm, or another suitable value, and can be selected based on the lengths of the pallet longitudinal beam 104 and the pallet cross beam 110. In other words, the second latch 114 is located near the connection between the pallet longitudinal beam 104 and the pallet cross beam 110, providing greater structural strength at this connection. This provides high-strength protection for the connection between the sampling line 1081 and the sampling connector 1086, making the sampling line 1081 less susceptible to crushing and fracture. In the embodiment shown in FIG7 , the second latch 114 is located on the pallet longitudinal beam 104, so D is a longitudinal distance. If the second latch 114 is located on the pallet cross beam 110, the distance D is a transverse distance.

[0051] As can be seen more clearly in FIG. 4 , the battery module 113 is installed in the battery accommodation space 103 , and the sampling nickel sheet 1082 is connected to the connecting sheet 1131 of the battery module 113 .

[0052] As can be seen more clearly in FIG. 5 , the battery module 113 is installed in the battery accommodation space 103 , and the quick-connect connector 1083 of the sampling bus 1084 is plugged into the sampling adapter harness plug 1132 of the battery module 113 .

[0053] 1 , one transverse side beam 101 is provided with a front distribution box 111, and the other transverse side beam 101 is provided with a rear distribution box 112. The sampling connector 1086 includes a quick-plug connector 1083, which is plugged into a low-voltage plug (not shown) of the front distribution box 111 or the rear distribution box 112.

[0054] Optionally, the accommodating groove 105 passes through the pallet longitudinal beam 104 in the longitudinal direction, so that the sampling bus 1084 can be protected by the pallet longitudinal beam 104 until the quick-plug connector 1083 of the sampling line 1081 extends into the front distribution box 111 or the rear distribution box 112.

[0055] The present application also proposes a car equipped with the battery pack described above, thereby providing higher safety.

[0056] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A battery pack (100), characterized in that: include: A battery tray (10) and a battery harness (20); The battery tray (10) has a structural beam (11), the structural beam (11) has a receiving groove (105), and the battery harness (20) is received in the receiving groove (105) and is insulated from the structural beam (11).

2. The battery pack (100) according to claim 1, characterized in that: It also includes a receiving member (30), the battery wiring harness (20) is received in the receiving member (30), and the receiving member (30) is received in the receiving groove (105).

3. The battery pack (100) according to claim 2, characterized in that: The receiving member (30) is a groove-shaped member, and the opening side of the receiving member (30) and the opening side of the receiving groove (105) face the same direction.

4. The battery pack (100) according to claim 2 or 3, characterized in that: The battery wiring harness (20) includes a high-voltage wire bus (106), and the accommodating member (30) includes a wire bus accommodating member (107). The high-voltage wire bus (106) is accommodated in the wire bus accommodating member (107), and the wire bus accommodating member (107) is accommodated in the accommodating groove (105).

5. The battery pack (100) according to claim 2 or 3, characterized in that: The battery wiring harness (20) includes a low-voltage wiring harness (108), the accommodating member (30) includes a low-voltage wire accommodating member (109), the low-voltage wiring harness (108) is accommodated in the low-voltage wire accommodating member (109), and the low-voltage wire accommodating member (109) is accommodated in the accommodating groove (105).

6. The battery pack (100) according to claim 5, characterized in that: The low-voltage wiring harness (108) comprises a sampling bus (1084), wherein the sampling bus (1084) comprises a plurality of sampling wires (1081) and an insulating layer (1085), and the plurality of sampling wires (1081) are wrapped together by the insulating layer (1085).

7. The battery pack (100) according to any one of claims 1 to 6, characterized in that: The battery wiring harness (20) includes a high-voltage wire bus (106) and a low-voltage wire harness (108), and the battery pack (100) further includes a wire bus accommodating member (107) and a low-voltage wire accommodating member (109), wherein the high-voltage wire bus (106) is accommodated in the wire bus accommodating member (107), and the low-voltage wire harness (108) is accommodated in the low-voltage wire accommodating member (109), and both the wire bus accommodating member (107) and the low-voltage wire accommodating member (109) are accommodated in the accommodating groove (105).

8. The battery pack (100) according to claim 7, characterized in that: The line row accommodating member (107) and the low-voltage line accommodating member (109) are both groove-shaped members, the opening side of the line row accommodating member (107), the opening side of the low-voltage line accommodating member (109) and the opening side of the accommodating groove (105) face the same direction, and the bottom wall of the low-voltage line accommodating member (109) closes the opening side of the line row accommodating member (107).

9. The battery pack (100) according to claim 8, characterized in that: The structural beam (11) has a reinforcing rib (1041), and the reinforcing rib (1041) supports the line row accommodating member (107) so that a spacing space exists between the line row accommodating member (107) and the bottom (1042) of the structural beam (11).

10. The battery pack (100) according to claim 6, characterized in that: The sampling bus (1084) has a plurality of sampling connectors (1086), and the low-voltage line accommodating member (109) has a plurality of first bayonet ports (1091), wherein the first bayonet ports (1091) are engaged with the sampling line (1081), so that the sampling connectors (1086) are located outside the low-voltage line accommodating member (109).

11. The battery pack (100) according to claim 10, characterized in that: The battery pack (100) further comprises a battery module (113); the sampling connector (1086) comprises a sampling nickel sheet (1082) and a quick-plug connector (1083); the sampling nickel sheet (1082) is connected to a connecting sheet (1131) of the battery module (113); and the quick-plug connector (1083) is plugged into a sampling adapter harness plug (1132) of the battery module (113).

12. The battery pack (100) according to claim 10, characterized in that: The receiving groove (105) is provided with a second snap-in opening (114), and the second snap-in opening (114) overlaps with the first snap-in opening (1091).

13. The battery pack (100) according to claim 12, characterized in that: The structural beam (11) comprises a pallet longitudinal beam (104) and a pallet cross beam (110), the pallet longitudinal beam (104) or the pallet cross beam (110) has the accommodating groove (105), the pallet longitudinal beam (104) is connected to the pallet cross beam (110), and the longitudinal or transverse distance from at least one of the second clamping openings (114) to the connection point between the pallet longitudinal beam (104) and the pallet cross beam (110) is less than a first threshold.

14. A car, characterized in that: The vehicle is equipped with a battery pack (100) as described in any one of claims 1 to 13.

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