Stacked battery pack

Abstract

The utility model aims at providing a kind of laminated battery pack, even in the case of filling material inside shell, the wiring length of battery cell can be shortened, and the wiring length of each battery cell can be consistent.Laminated battery pack has: shell, with the partition wall that separates first area and second area;At least one battery cell, housed in first area and fixed in shell by filling material;At least one device, housed in second area, and electrically connected with battery cell;Wiring, for electrically connecting battery cell and device;And protection component, clamps and protects wiring, and makes wiring penetrate partition wall, at least a part of partition wall is assembled partition wall that can be installed in shell, and assembled partition wall is assembled and arranged in the state of clamping and surrounding protection component.

Description

Technical Field

[0001] This disclosure relates to a stacked battery pack. Background Technology

[0002] Patent Document 1 discloses a battery technology comprising at least a stacked body consisting of stacked single cells (battery units), a deformation-absorbing portion, and an anisotropic elongation portion. In this battery, the deformation-absorbing portion is disposed between a cover member and the stacked single cells and is configured to absorb deformation of the single cells in the stacking direction. The anisotropic elongation portion is disposed on the side of the stacked body and is configured to elongate in the stacking direction according to the deformation of the single cells in the stacking direction.

[0003] Patent document 1: Japanese Patent Application Publication No. 2018-081820.

[0004] However, in the aforementioned conventional batteries, to secure the battery cells (single cells) by longitudinally stacking them within the casing, a hardenable filler can be injected into the space between the casing and the stack for fixation. In this case, conventional batteries also require connectors or satellite battery modules (SBMs) for connection to external devices within the casing. Therefore, in conventional batteries, to ensure the replaceability and quality of these components, it is necessary to prevent them from being buried by the filler; thus, partitions can be placed between the battery cells and the components to provide separation.

[0005] However, when a partition is placed between the battery cells and the device to separate them, the wiring used to connect the battery cells and the device must bypass the partition, which results in longer wiring and makes it difficult to keep the wiring length consistent between the stacked battery cells. There is still room for improvement. Utility Model Content

[0006] This disclosure is made in view of the above circumstances, and its purpose is to provide a stacked battery pack that can shorten the wiring length of the battery cells and keep the wiring length of each battery cell consistent even when the casing is filled with filler material.

[0007] The stacked battery pack disclosed herein comprises: a housing having a partition separating a first region from a second region; at least one battery cell housed in the first region and secured within the housing by a filler material; at least one device housed in the second region and electrically connected to the battery cell; wiring for electrically connecting the battery cell to the device; and a protective member for clamping and protecting the wiring and allowing the wiring to pass through the partition, at least a portion of the partition being an assembly partition that can be mounted within the housing, and the assembly partition being assembled in a state of clamping and surrounding the protective member.

[0008] Preferably, there may be multiple assembly partitions and multiple protective components, and the assembly partitions and the protective components are alternately stacked to form the partitions.

[0009] According to this disclosure, even when the casing is filled with filler material, the wiring length of the battery cells can be shortened and the wiring length of each battery cell can be kept consistent. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view showing a schematic structure of a stacked battery pack according to one embodiment.

[0011] Figure 2 This is a schematic cross-sectional view showing the stacked battery pack according to one embodiment in a frontal view before assembly.

[0012] Figure 3 This is a schematic cross-sectional view showing the stacked battery pack according to one embodiment in its frontal view after assembly.

[0013] Figure 4 This is a schematic cross-sectional view showing the stacked battery pack according to one embodiment in its assembled state as viewed from the side.

[0014] Figure 5 This is a schematic cross-sectional view showing a traditional stacked battery pack as viewed from the side. Detailed Implementation

[0015] The following description, in conjunction with the accompanying drawings, illustrates a tandem battery pack according to an embodiment of the present disclosure. Furthermore, the constituent elements in this embodiment include elements that can be substituted and easily implemented by those skilled in the art, or elements that are substantially the same.

[0016] Figure 1 This is a cross-sectional view showing a schematic structure of a stacked battery pack according to one embodiment. For example... Figure 1As shown, the stacked battery pack 1 includes: a housing 2 having a receiving space; and a partition wall 3 disposed within the housing 2 for separating the space within the housing 2 into a first region A1 and a second region A2. Furthermore, the stacked battery pack 1 also includes: at least one battery cell 40-43 housed in the first region A1 and fixed within the housing 2 by filling with a filling material (not shown); and at least one device 5 housed in the second region A2 and electrically connected to the battery cell 40-43.

[0017] The housing 2 is formed of a high-rigidity material or the like. In the first region A1 of the housing 2, battery cells 40-43, fixed in place by a filler material (not shown), are housed. In the second region A2, at least one device 5 that can be electrically connected to the battery cells 40-43 is housed.

[0018] The partition 3 has multiple assembled partitions 30-33 (i.e., water gates), a portion of each assembled partition being installable within the housing 2. Specifically, a portion of the partition 3 has a cutout, with a pair of support pillars on each side of the cutout area. The multiple assembled partitions 30-33 are inserted between these support pillars to form a partition. When filling material is injected into the first region A1, the partition 3 functions as a water gate to prevent the filling material from flowing from the first region A1 into the second region A2. Furthermore, the multiple assembled partitions 30-33 are respectively configured to clamp and hold paired protective components 7.

[0019] Multiple battery cells 40-43 are stacked and arranged vertically within the first region A1 of the housing 2. The battery cells 40-43 are composed of bipolar lithium-ion batteries or the like. Furthermore, the battery cells 40-43 are fixed within the first region A1 of the housing 2 by injecting a filler material such as a curable resin into it. Further, each battery cell 40-43 is electrically connected to the device 5 housed in the second region A2 via wiring 60-63.

[0020] Device 5 is electrically connected to each battery cell 40-43 via wiring 60-63. Device 5 may be, for example, a connector, an electronic control unit (ECU), or a control module such as an SBM.

[0021] Wiring 60-63 connects battery cells 40-43 to device 5 via partition 3 and protective component 7. Wiring 60-63 consists of flexible printed circuit (FPC) wiring such as thermistors or voltage detection lines.

[0022] The protective component 7 is disposed between each of the multiple assembly partitions 30-33, clamping and protecting the upper and lower sides of the wiring 60-63, and allowing the wiring 60-63 to pass through the partition 3. The protective component 7 is composed of sealing components such as sponge.

[0023] The following describes the assembly method of the stacked battery pack 1 constructed in this way. Figure 2 This is a schematic cross-sectional view showing the stacked battery pack 1 as viewed from the front before assembly. Figure 3 This is a schematic cross-sectional view showing the stacked battery pack 1 as viewed from the front after assembly. Figure 4 This is a schematic cross-sectional view showing the stacked battery pack 1 as viewed from the side after assembly. Figure 5 This is a schematic cross-sectional view showing a traditional stacked battery pack as viewed from the side.

[0024] like Figure 2 As shown, the stacked battery pack 1 is constructed in the following manner: At each boundary (upper or lower surface) of the plurality of assembly partitions 30-33, and between the partition 3 and the assembly partition 30, the wiring 60-63 is clamped and protected by a protective member 7, allowing the wiring 60-63 to pass through the partition 3. While the wiring 60-63 is led out from the first region A1 (filled with filler material) to the second region A2, the assembly partitions 30, 31, 32, and 33 are sequentially stacked within the housing 2 (see [reference]). Figure 3 and Figure 4 Subsequently, the stacked battery pack 1 fixes the battery cells 40-43 within the first region A1 by injecting the filling material 8 into the first region A1 of the housing 2.

[0025] In contrast, such as Figure 5 As shown, in a conventional stacked battery pack 1A, when a partition wall 3A is provided between the battery cells 40-43 and the device 5 for separation, the wiring 91-94 connecting the battery cells 40-43 and the device 5 respectively needs to bypass the partition wall 3A for connection. Therefore, the length of each wiring 91-94 will increase. In addition, in a conventional stacked battery pack 1A, it is difficult to keep the length of the wiring 91-94 between the stacked battery cells 40-43 consistent, thus lacking versatility.

[0026] In contrast, such as Figure 4 As shown, the stacked battery pack 1 houses battery cells 40-43 fixed within the housing 2 by a filler material (not shown) in the first region A1 of the housing 2, and houses at least one device 5 that can be electrically connected to the battery cells 40-43 in the second region A2. Even when the electrical connection is achieved through the partition 3 via wiring 60-63, the length of the wiring 60-63 of the battery cells 40-43 can be shortened, and the length of the wiring 60-63 of each battery cell 40-43 can be kept consistent.

[0027] According to the embodiment described above, the wiring 60-63 is clamped and protected by the protective member 7 at each boundary (upper or lower surface) of the plurality of assembly partitions 30-33 and between the partition 3 and the assembly partition 30, so that the wiring 60-63 passes through the partition 3. While the wiring 60-63 is led out from the first region A1 filled with filling material to the second region A2, the assembly partitions 30, 31, 32 and 33 are stacked in sequence in the housing 2. Therefore, even when electrical connection is achieved through the partitions 3 via wiring, the wiring length of the battery cell can be shortened and the wiring length of each battery cell can be kept consistent.

[0028] In addition, in one embodiment, a claw engagement structure for securing the protective component 7 may be provided on the partition 3 and the plurality of assembly partitions 30-33 in order to secure the protective component 7 and apply compression between them.

[0029] In addition, in one embodiment, structures such as brackets or wiring clamping holes for fixing wiring 60 to 63 may be provided on multiple assembly partitions 30 to 33.

[0030] In another embodiment, structures for fixing the device 5 may be provided on the plurality of assembly partitions 30-33. In this case, the plurality of assembly partitions 30-33 only need to have holes for connector claws of the fitting device 5 on the second region A2 side.

[0031] In addition, in one embodiment, the partition 3 can be fixed together with the plurality of assembled partitions 30 to 33 by means of double-sided tape or the like.

[0032] In addition, in one embodiment, components such as busbars can be provided inside the multiple assembly partitions 30 to 33 by means of insert molding.

[0033] Further effects or variations can be readily derived by those skilled in the art. Therefore, the broader scope of this disclosure is not limited to the specific details and representative embodiments shown and described above. Consequently, various modifications can be made without departing from the spirit and scope of the overall disclosure as defined by the appended claims and their equivalents.

Claims

1. A stacked battery pack, characterized in that, have: A housing having a partition wall that separates a first region from a second region; At least one battery cell is housed in the first region and secured within the housing by a filling material; At least one device is housed in the second region and electrically connected to the battery cell; Wiring for electrically connecting the battery cell to the device; as well as Protective components clamp and protect the wiring, and allow the wiring to pass through the partition. At least a portion of the partition is an assembly partition that can be installed within the housing, and the assembly partition is assembled in a state of clamping and surrounding the protective component.

2. The stacked battery pack according to claim 1, characterized in that, The assembly partition has multiple components, and the protective components have multiple components. The assembly partition and the protective components are alternately stacked to form the partition.

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