Battery pack and pre-assembly tool applied to battery pack

Abstract

The utility model relates to a battery pack and a pre-assembly tool applied to the battery pack, the battery pack comprises a main body part and a pre-assembly part, the main body part comprises a box body internally provided with a placement space and a battery module placed in the box body, one side surface of the box body is provided with an opening, and the opening is communicated with the placement space and the outside; the preassembling part is detachably connected to the main body part, the preassembling part comprises a panel, a plug connector and a connecting wire harness, the panel is connected to the box body and covers the opening, the plug connector is connected to the panel, one end of the connecting wire harness is connected to the plug connector, and the other end of the connecting wire harness extends towards the interior of the placing space and is connected with the battery module. According to the scheme, the battery pack, the preassembling part and the main body part can be assembled in parallel, so that the assembling efficiency is improved, meanwhile, a larger operation space is provided, the assembling difficulty is reduced, and the requirement for auxiliary fixing such as a bracket for fixing a connecting wire harness is also reduced, so that the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery and its production equipment, in particular to a battery pack and a pre-assembly tool applied to the battery pack. BACKGROUND

[0002] In order to meet the charging and discharging function of the battery pack, a connector needs to be arranged on the box of the battery pack to connect the inside and outside of the box. Therefore, during the production process of the battery pack, mounting holes with different shapes need to be arranged on the box, high-voltage connectors need to be arranged at the corresponding positions of the mounting holes, and the connectors need to be connected with the BDU control unit (battery pack circuit breaking unit) through copper bars inside the box.

[0003] Conventionally, the main assembly process of the battery pack is as follows: first, the connector is bolted to the end face of the box to avoid the space limitation inside the battery pack interfering with the installation of the connector; then, the BDU control unit is installed and fixed inside the box, and the BDU control unit is connected with other components inside the battery pack through copper bars; finally, the connector connected to the box is connected with the BDU control unit using copper bars, and is bolted.

[0004] In the above assembly process, the following problems exist: 1. When the connector is fixedly connected to the box, the part of the connector extending into the box will first occupy part of the space inside the box, and the subsequent BDU control unit, copper bars and corresponding fixing brackets will be affected in the movement space when being placed into the box; 2. After the BDU control unit, copper bars and corresponding fixing brackets are placed at the corresponding positions, the fixing bolts are usually in the direction of the bottom of the box, and the installation tools such as wrenches need to be vertically inserted into the corresponding positions from above, which is limited in operation and difficult in assembly operation; 3. In the assembly process, due to the limitation of the operation space, different processes cannot be carried out at the same time, and the installation of the connector and copper bars needs to be carried out after the in-box welding process of the front module of the battery pack, which is single in process and low in assembly efficiency. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a battery pack and a pre-assembly tool applied to the battery pack to solve the problems of limited assembly space, difficult assembly operation and low assembly efficiency in the existing assembly process of the battery pack.

[0006] A battery pack, comprising a main body part and a pre-assembly part, the main body part comprising a box with a placing space arranged inside and a battery module placed in the box, and one side face of the box being provided with an opening, the opening connecting the placing space and the outside; the pre-assembly part being detachably connected to the main body part, the pre-assembly part comprising a panel, a connector and a connection wire harness, the panel being connected to the box and covering the opening, the connector being connected to the panel, and one end of the connection wire harness being connected to the connector and the other end extending into the placing space and being connected to the battery module.

[0007] In one of the embodiments, the battery module comprises a circuit breaking unit fixedly connected to the box body, and at least part of the connection harness is connected to the circuit breaking unit.

[0008] In one of the embodiments, each of the connection harnesses is provided with a connecting hole at an end away from the plug-in part.

[0009] In one of the embodiments, the pre-assembly part further comprises a fastener, and the fastener is pre-assembled in at least part of the connecting hole.

[0010] In one of the embodiments, at least part of the connection harness is a strip-shaped conductive member.

[0011] In one of the embodiments, the panel is provided with a plug-in hole, the plug-in part is inserted into the plug-in hole, and the plug-in part at least partially protrudes from an end surface of the panel away from the main body part, and the plug-in hole is in a structure corresponding to a structure of the plug-in part.

[0012] A pre-assembly tool applied to a battery pack, the pre-assembly tool is applied to the battery pack as described in any one of the above embodiments, and the pre-assembly tool comprises a base and a column connected to the base, the column is provided with an open limiting slot, and the limiting slot is used for inserting the panel of the pre-assembly part of the battery pack to fix.

[0013] In one of the embodiments, the pre-assembly tool comprises at least two columns, and the limiting slots of the two columns are oppositely arranged, the distance between the slot bottoms of the two limiting slots is not less than the length of the panel, and the minimum distance between the two limiting slots is less than the length of the panel.

[0014] In one of the embodiments, the pre-assembly tool further comprises a guide column connected to the base, the guide column is used for being arranged inside the connecting hole of an end of the connection harness away from the plug-in part of the pre-assembly part, and the diameter of the guide column is not greater than the hole diameter of the connecting hole.

[0015] In one of the embodiments, the distribution of the guide column corresponds to the distribution of the connection position of the battery module and the connection harness in the battery pack.

[0016] In one of the embodiments, the pre-assembly tool further comprises a support table connected to the base, the support table comprises a support surface away from the base, and the support surface is used for supporting the connection harness.

[0017] In one of the embodiments, the support table comprises a relief hole in the support surface, which is used to reserve the mounting space for the fastener connected with the connection wire harness, and the aperture of the relief hole is not less than the diameter of the fastener.

[0018] In the above-mentioned battery pack, the pre-assembly part and the main body part can be assembled after the completion of the respective assembly, and the assembly of the pre-assembly part and the main body part can be carried out in parallel, thereby improving the assembly efficiency. In addition, compared with the narrow space in the box, the panel, the connector and the connection wire harness can be fixed in advance on the pre-assembly tool, which has a larger operation space, can greatly avoid the interference between the tool and the box and the internal devices during the assembly process, reduces the assembly difficulty, and also reduces the design difficulty of the internal structure of the box due to the avoidance of the interference check of the operation space. Moreover, the pre-assembly of the pre-assembly part fixes the relative positions of the panel, the connector and the connection wire harness, thereby reducing the need for auxiliary fixation such as the bracket for fixing the connection wire harness during the assembly of the pre-assembly part and the main body part, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic diagram of a battery pack according to an embodiment of the present application.

[0020] Figure 2 FIG. 2 is an exploded structural schematic diagram of the battery pack according to the embodiment of the present application. Figure 1

[0021] Figure 3 FIG. 3 is a structural schematic diagram of the battery pack according to another embodiment of the present application. Figure 1

[0022] Figure 4 FIG. 4 is an exploded structural schematic diagram of a part of the battery pack according to the embodiment of the present application. Figure 1

[0023] Figure 5 FIG. 5 is a structural schematic diagram of a pre-assembly tool and a pre-assembly part according to an embodiment of the present application.

[0024] Figure 6 FIG. 6 is an assembly state schematic diagram of the pre-assembly tool and the pre-assembly part according to the embodiment of the present application. Figure 5

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] ​​​​100, battery pack; 110, main body; 111, box body; 1111, placing space; 1112, opening; 112, battery module; 120, pre-assembly part; 121, panel; 1211, insertion hole; 122, insertion piece; 123, connection wire harness; 1231, connection hole; 124, fastener; 200, pre-assembly tool; 210, base; 220, stand column; 221, limiting groove; 230, guide column; 240, support table; 241, support surface; 242, avoiding hole. DETAILED DESCRIPTION

[0027] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of "including", "comprising", or "having" and variations thereof herein are meant to encompass the items listed thereafter and equivalents thereof as well as additional items.

[0028] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0030] In the present application, unless specifically defined and limited otherwise, if there is any appearance of the terms "mount", "connect", "connection", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless specifically defined and limited otherwise, if there is any appearance of the terms "mount", "connect", "connection", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0033] Referring to Figures 1 to 4 , Figures 1 to 4 The structure of the battery pack 100 in an embodiment of the present application is shown. The battery pack 100 provided by the embodiment of the present application is applied to a power consumption device using a battery as a power source, which can be, but is not limited to, a battery car, an electric vehicle, etc.

[0034] As Figures 1 to 3 shown, the battery pack 100 includes a main body part 110 and a preloading part 120, wherein the main body part 110 includes a box body 111 with a placing space 1111 inside and a battery module 112 placed in the box body 111. It should be noted that the battery module 112 is a general term for other modules in the battery pack 100 except the box body 111. The battery module 112 is not completely shown in the drawings of the present application, only part of the structure in the battery module 112 is shown, and the content of the drawing is not a limitation on the battery module 112. And as Figure 2 andFigure 4 As shown, an opening 1112 is provided on one side of the housing 111. The opening 1112 connects the placement space 1111 with the outside. The opening 1112 is an installation space reserved for the pre-installation part 120.

[0035] like Figures 1 to 4 As shown, the pre-assembly part 120 is detachably connected to the main body part 110. During the production process of the battery pack 100, the pre-assembly part 120 and the main body part 110 can be assembled separately and then assembled together. The assembly of the pre-assembly part 120 and the main body part 110 can be carried out in parallel to improve assembly efficiency.

[0036] like Figures 1 to 4 As shown, the pre-installed part 120 includes a panel 121, a connector 122, and a connecting harness 123, wherein the panel 121 is connected to the housing 111 and as shown... Figure 1 and Figure 3 As shown, when panel 121 is connected to housing 111, panel 121 covers opening 1112. Preferably, the connection between panel 121 and housing 111 is a sealed connection. Figure 2 and Figure 4 As shown, connector 122 is connected to panel 121, and as... Figure 3 As shown, one end of the connecting harness 123 is connected to the connector 122, and the other end extends into the placement space 1111 and connects to the battery module 112. Conventionally, each connector 122 includes a positive terminal and a negative terminal, and correspondingly, the positive and negative terminals of each connector 122 are connected to different connecting harnesses 123 to enable the charging and discharging of the battery module 112 through the connector 122.

[0037] In one embodiment, the battery module 112 includes a circuit breaker unit (not shown) fixedly connected to the housing 111, i.e., a BDU control unit, and at least a portion of the connecting harness 123 is connected to the circuit breaker unit at the end away from the connector 122. In practice, the battery module 112 may also include individual battery cells, etc., without limitation.

[0038] like Figure 3 and Figure 5 As shown, in one embodiment, each connecting wire harness 123 has a connecting hole 1231 at the end away from the connector 122. Typically, both ends of the connecting wire harness 123 have connecting holes 1231, and the connecting hole 1231 near the end of the connector 122 is pre-installed on the positive or negative terminal of the corresponding connector 122.

[0039] like Figure 4 and Figure 5As shown in the drawings, in one embodiment, the pre-assembly part 120 further comprises fasteners 124, which are at least partially pre-assembled in the connecting holes 1231, and are used to connect and fasten the connecting harness 123 and the corresponding battery module 112. In this embodiment, the fasteners 124 are bolts.

[0040] As shown in the drawings, Figure 3 and Figure 5 As shown in the drawings, in one embodiment, at least part of the connecting harness 123 is a strip-shaped conductive member, such as a copper bar. By using a strip-shaped conductive member, its position is relatively fixed after pre-assembly and is not easy to change, which is more convenient for the overall installation of the pre-assembly part 120 to the main body part 110.

[0041] As shown in the drawings, Figure 4 As shown in the drawings, in one embodiment, the panel 121 is provided with a socket 1211, the plug-in part 122 is inserted into the socket 1211, and as shown in the drawings, Figure 1 As shown in the drawings, the plug-in part 122 at least partially protrudes from the end surface of the panel 121 away from the main body part 110, so as to facilitate the connection of an external charging head or the like to the plug-in part 122. As shown in the drawings, Figure 4 As shown in the drawings, the structure of the socket 1211 is a structure corresponding to the structure of the plug-in part 122, so as to facilitate the sealed connection of the plug-in part 122 and the panel 121, and avoid affecting the overall sealing of the battery pack 100.

[0042] In the above-mentioned scheme, the battery pack 100, in the production process, the pre-assembly part 120 and the main body part 110 can be assembled respectively, and then the two are assembled, the assembly of the pre-assembly part 120 and the main body part 110 can be parallel, so as to improve the assembly efficiency, at the same time, compared with the narrow space 1111 in the box body 111, when the panel 121, the plug-in part and the connecting harness 123 are fixed in advance on the pre-assembly tool 200 described below, there is more operating space, which can greatly avoid the interference problem between tools and the box body 111 and its internal devices in the assembly process, and also reduces the design difficulty of the internal structure of the box body 111 by avoiding the interference check of the operating space, and the pre-assembly of the pre-assembly part 120 makes the relative positions of the panel 121, the plug-in part 122 and the connecting harness 123 fixed, which reduces the need for auxiliary fixation such as brackets for fixing the connecting harness 123 in the assembly process of the pre-assembly part 120 and the main body part 110, thereby reducing the cost.

[0043] As shown in the drawings, Figure 2 As shown in the drawings, Figure 2 The structure of the pre-assembly tool 200 applied to the battery pack 100 in an embodiment of the present application is shown, and the pre-assembly tool 200 applied to the battery pack 100 is also provided in an embodiment of the present application. The pre-assembly tool 200 is applied to the battery pack 100 in any of the above-mentioned embodiments, and plays an auxiliary role in the assembly of the pre-assembly part 120.

[0044] As shown in Figure 5 and Figure 6 , the pre-assembly tool 200 includes a base 210 and a column 220 connected to the base 210, the column 220 is provided with an open limiting groove 221, the limiting groove 221 is used for inserting the panel 121 to fix the panel 121, after the panel 121 is inserted into the limiting groove 221, the groove wall of the limiting groove 221 abuts against the panel 121 to limit the panel 121, avoiding the displacement of the panel 121 affecting the assembly precision in the assembly of the pre-assembly part 120.

[0045] As shown in Figure 5 and Figure 6 , in one of the embodiments, the pre-assembly tool 200 includes at least two columns 220, the limiting grooves 221 provided in the two columns 220 are oppositely arranged, the distance between the groove bottoms of the two limiting grooves 221 is not less than the length of the panel 121, and the minimum distance between the two limiting grooves 221 is less than the length of the panel 121, so that the two ends of the panel 121 are respectively inserted into the oppositely arranged two limiting grooves 221, thereby fixing the panel 121 through the two limiting grooves 221 to improve the fixing stability of the panel 121. In other embodiments, the pre-assembly tool can also be provided with only one column 220, at this time, the longer edge of the panel 121 is inserted into the limiting groove 221, which can also play a role in limiting the panel 121.

[0046] As shown in Figure 5 and Figure 6 , in one of the embodiments, the pre-assembly tool 200 further includes a guide column 230 connected to the base 210, the guide column 230 is used for penetrating the inside of the connecting hole 1231 provided at the end of the connecting wire harness 123 away from the plug-in part 122, and the diameter of the guide column 230 is not greater than the hole diameter of the connecting hole 1231, so that the connecting hole 1231 can be sleeved on the outer periphery of the guide column 230, thereby allowing the two ends of the connecting wire harness 123 to be connected to the guide column 230 and the plug-in part 122 respectively, so as to limit the position and shape of the connecting wire harness 123.

[0047] In one of the embodiments, the distribution of the guide column 230 corresponds to the distribution of the part for connecting the connecting wire harness 123 in the battery module 112, so that the position of the connecting wire harness 123 connected to the guide column 230 corresponds to the position when connected to the battery module 112, thereby avoiding adjusting the position and shape of the connecting wire harness 123 inside the box body 111, compared with the narrowness of the placing space 1111 inside the box body 111, it has a larger operation space, which can greatly avoid the interference problem of tools and internal devices of the box body 111 during assembly.

[0048] As shown in Figure 5 and Figure 6As shown, in one of the embodiments, the pre-assembly tool 200 further comprises a support table 240 connected to the base 210, the support table 240 comprises a support surface 241 facing away from the base 210, the support surface 241 is used to support the connection wire harness 123 to avoid the connection wire harness 123 from being deformed to damage the pre-positioning of the connection wire harness 123 by the guide column 230 after the pre-assembly part 120 is assembled.

[0049] In some embodiments, the number of the splices 122 is multiple, and the positive or negative poles of some of the splices 122 need to be connected to the same part in the battery module 112. During the assembly of the pre-assembly part 120, different connection wire harnesses 123 connected to the same part in the battery module 112 can be connected by the fasteners 124, thereby reducing the assembly process when the pre-assembly part 120 and the main body part 110 are assembled. As shown, Figure 5 As shown, in one of the embodiments, the support table 240 comprises a relief hole 242 opened in the support surface 241, the relief hole 242 is used to reserve the installation space of the fastener 124 connected to the connection wire harness 123 to avoid the fastener 124 from being connected to the connection wire harness 123 to be interfered by the support table 240 and not be screwed tightly. The diameter of the relief hole 242 is not less than the diameter of the corresponding fastener 124, so that the fastener 124 can pass through the connection wire harness 123 and be partially inserted into the relief hole 242, thereby realizing the fastening of the connection wire harness 123.

[0050] The pre-assembly tool 200 applied to the battery pack 100 provided in the above scheme is different from the assembly tool of the whole part of the battery pack 100, so that the assembly of the pre-assembly part 120 and the main body part 110 can be parallel, thereby improving the assembly efficiency, and the pre-assembly tool 200 has a larger operation space, which can greatly avoid the interference problem between the tool and the box body 111 and the internal devices thereof during the assembly, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0052] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A battery pack, characterized by, The battery pack comprises: a main body part comprising a box with a placing space inside and a battery module placed in the box, and an opening is formed on one side of the box, which communicates the placing space with the outside; and a pre-assembly part detachably connected to the main body part, which comprises a panel, a plug-in connector and a connection wire harness, the panel is connected to the box and covers the opening, the plug-in connector is connected to the panel, and one end of the connection wire harness is connected to the plug-in connector and the other end extends into the placing space and is connected to the battery module.

2. The battery pack of claim 1, wherein, The battery module comprises a circuit breaking unit fixedly connected to the box, and at least part of the connection wire harness is connected to the circuit breaking unit.

3. The battery pack of claim 1, wherein, Each end of the connection wire harness away from the plug-in connector is provided with a connecting hole.

4. The battery pack of claim 3, wherein, The pre-assembly part further comprises a fastener, and at least part of the connecting hole is pre-assembled with the fastener.

5. The battery pack of claim 1, wherein, At least part of the connection wire harness is a strip-shaped conductive member.

6. The battery pack of claim 1, wherein, The panel is provided with a plug hole, the plug-in connector is inserted into the plug hole, and the plug-in connector at least partially protrudes from the end surface of the panel away from the main body part, and the structure of the plug hole is a profiled structure corresponding to the structure of the plug-in connector.

7. A pre-assembly tool applied to a battery pack, characterized in that, The pre-assembly tool is applied to the battery pack as claimed in any one of claims 1-6, and the pre-assembly tool comprises a base and a stand connected to the base, the stand is provided with an open limiting slot, and the limiting slot is used for inserting the panel of the pre-assembly part to fix.

8. The pre-assembly tool for a battery pack according to claim 7, wherein The pre-assembly tool comprises at least two stands, and the limiting slots of the two stands are oppositely arranged, the distance between the slot bottoms of the two limiting slots is not less than the length of the panel, and the minimum distance between the two limiting slots is less than the length of the panel.

9. The pre-assembly tool for a battery pack of claim 7, wherein, The pre-assembly tool further comprises a guide column connected to the base, the guide column is used for penetrating the inside of the connecting hole of the end of the connection wire harness away from the plug-in connector of the pre-assembly part, and the diameter of the guide column is not greater than the hole diameter of the connecting hole.

10. The pre-assembly tool for a battery pack of claim 9, wherein, The distribution of the guide column corresponds to the distribution of the connection part of the battery module and the connection wire harness in the battery pack.

11. The pre-assembly tool for a battery pack of claim 7, wherein, The pre-assembly tool further comprises a support table connected to the base, and the support table comprises a support surface away from the base, which is used for supporting the connection wire harness.

12. The pre-assembly tool for a battery pack of claim 11, wherein, The support table comprises a relief hole formed in the support surface, which is used for reserving the mounting space of the fastener connected to the connection wire harness, and the hole diameter of the relief hole is not less than the diameter of the fastener.

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