CN219553792U - Waterproof battery pack - Google Patents
Waterproof battery pack Download PDFInfo
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- CN219553792U CN219553792U CN202320674786.XU CN202320674786U CN219553792U CN 219553792 U CN219553792 U CN 219553792U CN 202320674786 U CN202320674786 U CN 202320674786U CN 219553792 U CN219553792 U CN 219553792U
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- sleeve
- layer
- battery
- waterproof
- negative electrode
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a waterproof battery pack, which is characterized in that: the battery pack comprises a battery core, a multilayer sleeve structure for coating the battery core, and a wire bundle for electrically connecting the battery core with external equipment, wherein the multilayer sleeve structure at least comprises: layer 1 sleeve; two 1 st insulating plates; layer 2 sleeve; two 2 nd insulating plates; the 3 rd layer sleeve, the wire bundle is disposed at the side of the battery cell with at least a portion thereof between the 1 st layer sleeve and the 3 rd layer sleeve. The waterproof battery pack of the utility model not only can effectively reduce the cost, but also can ensure reliable waterproof performance by a specific multi-layer sleeve structure.
Description
Technical Field
The present utility model relates to a waterproof battery pack, and more particularly, to a waterproof battery pack having a multi-layered sleeve structure.
Background
In recent years, with the continuous development and popularization of various electronic devices such as personal computers, cellular phones, game machines, etc., there has been an increasing demand for secondary batteries and battery packs thereof as power sources thereof, and battery packs suitable for various uses have been developed.
According to the prior art, when the battery pack has higher waterproof performance and rigidity requirements, as shown in fig. 6, the hard plastic tube (1 ') and the edge of the end cover (3 ') positioned at the end face of the battery core (2) are welded together by ultrasonic welding, the wire bundle (4) penetrates out of the wire hole (5) arranged on the end cover (3 '), and then the wire hole (5) is sealed by using sealing materials such as glue to form a waterproof structure. In such a waterproof structure, the design of the components is complicated, the material cost is high, the assembly is difficult, and the assembled battery is unstable in size and large in deviation. In addition, due to the special nature of the battery structure (e.g., too small a size, etc.), conventional ultrasonic welding is sometimes not practical.
When the rigidity requirements for the battery pack are not particularly stringent, heat shrink tubing may be used in place of rigid plastic tubing to seal the battery cells. The size (length and diameter) of the heat shrinkage sleeve before the battery core is sleeved is larger than that of the battery core, the heat shrinkage sleeve is moderately shrunk to be closely attached to the side face of the battery core after heat shrinkage, the overlong parts at the two ends are caulked to be coated on the end face of the battery core, and at the moment, waterproof glue can be further adopted to seal the two end faces of the battery core, so that the integral waterproof effect of the battery pack is achieved.
Compared with the mode of adopting plastic pipe and ultrasonic welding, the material cost in the mode of adopting heat shrinkage bush is reduced, the mould is not required to be opened, ultrasonic welding is not required, and the waterproof plastic pipe has the advantages of low cost and simple operation, but sometimes cannot achieve good waterproof performance.
In order to ensure the waterproof performance of a battery pack employing a heat-shrinkable tube, it is reported in patent document 1 that gaskets are provided on the inner side of the heat-shrinkable tube, and waterproof gaskets are provided at the head end and the tail end of the heat-shrinkable tube; patent document 2 reports that an insulating layer is provided on the inner side of a heat-shrinkable tube, an insulating plate is provided at the end face of a battery core, a hole for leading out a wire is provided on the insulating plate, and the periphery of the hole and the junction of the heat-shrinkable tube and the insulating plate are sealed with a seal ring; further, patent document 3 reports that waterproof foam is used instead of a drool type waterproof adhesive. However, these prior arts cannot sufficiently ensure the waterproof performance of the battery pack, and sometimes cannot avoid waterproof failure due to breakage of the single-layer heat-shrinkable tube.
Prior art literature
Patent literature
Patent document 1: CN211858747U
Patent document 2: CN217956020U
Patent document 3: CN217589195U
Disclosure of Invention
The present utility model has been made in view of the above problems, and an object of the present utility model is to provide a waterproof battery pack having a multi-layered sleeve structure capable of ensuring reliable waterproof performance with reduced costs.
The waterproof battery pack of the present utility model is characterized in that: comprising a battery core, a multi-layered sleeve structure covering the battery core, and a wire harness for electrically connecting the battery core with an external device,
the multilayer sleeve structure comprises at least:
a 1 st layer sleeve which covers the whole side surface of the battery core, wherein two ends of the sleeve are respectively caulking on two battery end surfaces of the battery core to form a 1 st caulking part;
two 1 st insulating plates that cover two battery end faces of the battery cell and surfaces of the 1 st caulking portion, respectively;
a layer 2 sleeve which is of a split structure and respectively covers the side surfaces of the upper end part and the lower end part of the layer 1 sleeve, and two ends of the sleeve are respectively calked on the surface of the layer 1 insulating plate to form a layer 2 calked part;
two 2 nd insulating plates covering surfaces of the 1 st insulating plate and the 2 nd caulking portion, respectively;
a 3 rd sleeve covering the entire side surfaces of the 1 st sleeve and the 2 nd sleeve, both ends of which are respectively caulked on the surface of the 2 nd insulating plate to form a 3 rd caulking portion,
the wire harness is disposed on a side of the battery cell with at least a portion thereof between the layer 1 bushing and the layer 3 bushing.
Preferably, the wire bundle at least comprises a positive electrode wire and a negative electrode wire, one ends of the positive electrode wire and the negative electrode wire are respectively electrically connected with a positive electrode terminal and a negative electrode terminal of the battery core through a positive electrode guide plate and a negative electrode guide plate, and the other ends of the positive electrode wire and the negative electrode wire form a leading-out end electrically connected with external equipment.
Preferably, the lead-out end extends from between the layer 2 sleeve and the layer 3 sleeve to the outside.
Preferably, a part of the positive electrode guide plate and the negative electrode guide plate is located between the 1 st insulating plate and the 1 st caulking portion, and the other part is located between the 1 st layer sleeve and the 2 nd layer sleeve.
Preferably, the harness further includes a PTC thermistor disposed adjacent to the positive electrode guide plate or the negative electrode guide plate between the 1 st layer bushing and the 2 nd layer bushing.
Preferably, no through hole is provided in each of the 1 st insulating plate and the 2 nd insulating plate.
Preferably, the 1 st insulating plate and the 2 nd insulating plate are PC insulating plates with low moisture absorption rate.
Preferably, the layer 1 sleeve, the layer 2 sleeve and the layer 3 sleeve are PVC heat shrink sleeves.
Preferably, the battery core comprises a plurality of series or parallel single cells.
Preferably, the unit cell is a nickel-hydrogen secondary battery or a lithium secondary battery.
Effects of the utility model
The waterproof battery pack of the utility model not only can effectively reduce the cost by replacing the traditional hard plastic pipe with the low-cost multilayer heat-shrinkable sleeve and the insulating plate with low moisture absorption rate, but also can ensure the reliable waterproof performance of the battery pack by the specific multilayer sleeve structure.
Drawings
Fig. 1 is an exploded view showing the structure of a waterproof battery pack of the present utility model.
Fig. 2 is a schematic view showing a state in which a 1 st layer sleeve is attached to a battery cell in a waterproof battery pack according to the present utility model.
Fig. 3 is a schematic view showing a connection state of a wire harness in the waterproof battery pack of the present utility model.
Fig. 4 is a schematic view showing a state in which a 2 nd layer sleeve is attached to a battery cell in a waterproof battery pack according to the present utility model.
Fig. 5 is a schematic view showing a state in which the battery cell of the waterproof battery pack of the present utility model is covered with the 3 rd layer sleeve.
Fig. 6 is a schematic cross-sectional view showing the structure of a waterproof battery pack of the related art.
Detailed Description
Next, a specific embodiment of the waterproof battery pack according to the present utility model will be described with reference to the drawings.
Fig. 1 is an exploded view showing the structure of a waterproof battery pack of the present utility model.
As shown in fig. 1, the waterproof battery pack of the present utility model includes a battery cell (2), a multilayer sleeve structure (1) that covers the battery cell (2), and a wire harness (4) for electrically connecting the battery cell (2) with an external device (not shown), wherein the multilayer sleeve structure (1) includes at least: a layer 1 sleeve (11), a layer 2 sleeve (12), a layer 3 sleeve (13), two layer 1 insulating plates (31), and two layer 2 insulating plates (32).
Wherein, the 1 st layer sleeve (11) covers the whole side surface of the battery core (2), and two ends of the sleeve are respectively calked on two battery end surfaces of the battery core (2) to form a 1 st calked part (11 a); two 1 st insulating plates (31) respectively cover two battery end faces of the battery core (2) and the surface of the 1 st caulking part (11 a); the 2 nd layer sleeve (12) is of a split structure, covers the side surfaces of the two end parts (namely the upper end part and the lower end part) of the 1 st layer sleeve (11) respectively, and is respectively calked on the surface of the 1 st insulating plate (31) at the two ends to form a 2 nd calked part (12 a); the two 2 nd insulating plates (32) cover the surfaces of the two 1 st insulating plates (31) and the 2 nd caulking portions (12 a), respectively; the 3 rd layer sleeve (13) covers the whole side surfaces of the 1 st layer sleeve (11) and the 2 nd layer sleeve (12), two ends of the 3 rd layer sleeve are respectively calked on the surface of the 2 nd insulating plate (32) to form a 3 rd calked part (13 a), and finally the waterproof battery pack is assembled.
As can also be seen from fig. 1, the waterproof battery pack of the present utility model further comprises a harness (4) for electrically connecting the battery cell (2) with an external device, the harness (4) being provided on the side of the battery cell (2) with at least a portion thereof being located between the 1 st layer sleeve (11) and the 3 rd layer sleeve (13).
The waterproof battery pack adopts the multilayer sleeve to replace the hard plastic pipe, so that the waterproof battery pack can be sealed by adopting a thermal shrinkage process to replace ultrasonic welding, and the working procedure is simplified; meanwhile, the end face of the battery is sealed by adopting the 1 st insulating plate and the 2 nd insulating plate, so that the sealing process of using glue and the like is omitted, and the material cost is reduced. Further, since the heat-shrinkable tube has a multilayer sleeve structure, it is possible to sufficiently avoid waterproof failure due to breakage of the single-layer heat-shrinkable tube while maintaining a certain rigidity.
Next, the multi-layered sleeve structure and the assembly process of the waterproof battery pack of the present utility model will be described in more detail with reference to fig. 2 to 5.
Fig. 2 is a schematic view showing a state in which a 1 st layer sleeve (11) is fitted over a battery cell (2) in the waterproof battery pack of the present utility model.
As shown in fig. 2, the 1 st layer sleeve (11) is covered on the entire side surface of the battery cell (2), both ends of the sleeve are crimped on the battery end surface of the battery cell (2) by heat shrinkage to form a 1 st crimped portion (11 a), and then the 1 st insulating plate (31) is covered outside the 1 st crimped portion (11 a).
By heat-shrinking the first-layer sleeve (11) on the side surface of the battery cell (2), water and the like can be prevented from entering from the side surface of the battery pack. In addition, by forming the 1 st caulking portion (11 a) and the 1 st insulating plate (31) on the battery end face, entry of moisture and the like from the battery end face can be prevented.
Then, a wire harness (4) for electrical connection with an external device is provided on the side surface of the battery cell (2), the whole of which is located outside the first-layer sleeve (11).
Fig. 3 is a schematic view showing a connection state of the harness (4) of the waterproof battery pack of the present utility model.
As shown in fig. 3, the wire harness (4) includes at least a positive electrode wire (41) and a negative electrode wire (42), one end of the positive electrode wire (41) is electrically connected to the positive electrode terminal of the battery cell (2) through a positive electrode guide plate (43), one end of the negative electrode wire (42) is electrically connected to the negative electrode terminal of the battery cell (2) through a negative electrode guide plate (44), and the other ends of the positive electrode wire (41) and the negative electrode wire (42) constitute a lead-out end (45) electrically connected to an external device.
The wire bundle (4) may further include a PTC thermo-sensitive element (46) or the like, and the PTC thermo-sensitive element (46) may be disposed adjacent to the positive electrode guide plate (43) or the negative electrode guide plate (44) and also outside the 1 st layer sleeve (11).
After the heat shrinkage of the first sleeve 11 is completed, first, one ends of the positive electrode guide plate 43 and the negative electrode guide plate 44 are spot-welded to positive and negative electrode terminals of two battery end faces of the battery core, respectively, and then the other ends of the positive electrode guide plate 43 and the negative electrode guide plate 44 are bent along the side face of the battery core 2 to be connected with one ends of the positive electrode lead 41 and the negative electrode lead 42, respectively. The other ends of the positive electrode lead (41) and the negative electrode lead (42) are joined and extend outward along the side surface of the battery pack to form a lead-out terminal (45) for electrical connection with an external device (not shown).
Then, a 1 st insulating plate (31) made of PC material with low moisture absorption rate is attached to the two battery end faces of the battery core, and the two battery end faces of the battery core (2) and the 1 st caulking part (11 a) are respectively covered by the 1 st insulating plate (31), so that external moisture is further prevented from entering the battery pack from the up-down direction.
The positive electrode guide plate (43) and the negative electrode guide plate (44) are respectively close to the upper end and the lower end of the battery core and are positioned outside the 1 st layer sleeve (11). Specifically, a part of the positive electrode guide plate (43) and the negative electrode guide plate (44) is located between the 1 st insulating plate (31) and the 1 st caulking portion (11 a), and the other part is located between the 1 st layer sleeve (11) and the 2 nd layer sleeve (12).
The PTC thermosensitive element (46) is disposed adjacent to the positive electrode lead (41) or the negative electrode lead (42), and is also located outside the 1 st layer sleeve (11), preferably between the 1 st layer sleeve (11) and the 2 nd layer sleeve (12).
Since the entire wire harness (4) is located outside the first-layer sleeve (11), adverse effects on the arrangement of the wire harness (4) due to seepage which may occur inside the battery cell in extreme cases can be prevented.
Fig. 4 is a schematic view showing a state in which a 2 nd layer sleeve is attached to a battery cell in a waterproof battery pack according to the present utility model.
As shown in fig. 4, the 2 nd sleeve (12) has a split structure and is respectively positioned at two end parts of the battery cell (2), namely, respectively covers the side surfaces of the upper end part and the lower end part of the 1 st sleeve (11), and two ends of the 2 nd sleeve are respectively calked on the surface of the 1 st insulating plate (31) to form a 2 nd calked part (12 a). Then, the 2 nd insulating plate (32) is covered on the outer side of the 2 nd caulking portion (12 a).
At this time, the PTC thermosensitive element (46) is disposed adjacent to the negative electrode lead (42), the positive electrode lead (41) led out from between the 1 st layer sleeve (11) and the 2 nd layer sleeve (12) is folded back at the edge of the 2 nd layer sleeve (12), and is joined to the negative electrode lead (42) and the PTC thermosensitive element (46) to form a lead bundle (4), which extends along the side surface of the battery cell in the direction of approaching the positive electrode terminal, and forms a lead-out end (45) electrically connected to an external device.
The arrangement is not limited to the above, and the PTC thermosensitive element (46) may be provided adjacent to the positive electrode lead (41), and the negative electrode lead (42) led out from between the 1 st layer sleeve (11) and the 2 nd layer sleeve (12) may be folded back at the edge of the 2 nd layer sleeve (12), joined together with the positive electrode lead (41) and the PTC thermosensitive element (46), and formed into a lead bundle (4), and extended along the side surface of the battery cell in a direction toward the negative electrode terminal, to form a lead-out terminal (45) electrically connected to an external device.
Then, a 2 nd insulating plate (32) made of PC material with low moisture absorption rate is attached to the two battery end faces of the battery core, and the 2 nd insulating plate (32) covers the two battery end faces of the battery core (2) and the 2 nd caulking part (12 a) respectively, so that water can be prevented from entering from the positive electrode guide plate and the negative electrode guide plate of the wire bundle (4), and external moisture can be further prevented from entering the inside of the battery pack from the up-down direction.
By providing the 2 nd layer sleeve (12) of the split structure, the insulating plate (31) and the 2 nd insulating plate (32) are mutually matched, so that the entry of moisture from the upper end and the lower end of the battery core, the end face of the battery and the like can be more effectively prevented.
Fig. 5 is a schematic view showing a state in which the battery cell of the waterproof battery pack of the present utility model is covered with the 3 rd layer sleeve.
As shown in fig. 5, the third layer sleeve (13) is heat-shrunk with respect to the entire side surface of the battery cell (2), whereby the third layer sleeve (13) covers the entire side surfaces of the 1 st layer sleeve (12) and the 2 nd layer sleeve (12), both ends of which are respectively caulking on the surface of the 2 nd insulating plate (32), forming a 3 rd caulking portion (13 a), and performing the final waterproof treatment.
Since no through hole is provided in the 2 nd insulating plate (32), the lead-out end (45) of the wire harness (4) passes through between the 2 nd layer sleeve (12) and the 3 rd layer sleeve (13), extends to the outside, and is electrically connected to an external device through an external connection terminal (47).
The third layer sleeve (13) has the main function of ensuring the waterproof effect of the battery pack finally, and the overall appearance of the battery pack becomes complete and beautiful, and the size is easy to control.
By the multi-layer sleeve structure, the assembled battery pack can have certain rigidity, has excellent waterproof performance, and is low in cost and convenient to assemble.
Because no through holes are arranged on the 1 st insulating plate (31) and the 2 nd insulating plate (32), and the leading-out ends (45) of the wire bundles (4) extend to the outside from the position between the 2 nd layer sleeve (12) and the 3 rd layer sleeve (13), the process of coating waterproof glue on the insulating plates on the end faces of the batteries can be omitted, the process is saved, and the waterproof performance of the battery pack is further improved.
In the waterproof battery pack of the present utility model, the material of the 1 st to 3 rd layer bushings is not particularly limited as long as the bushings can be sealed by a heat shrinkage process, and PVC heat shrinkage bushings are preferable. The 1 st insulating plate and the 2 nd insulating plate are insulating plates with low moisture absorption rate, and are preferably PC insulating plates.
The battery cell of the waterproof battery pack of the present utility model may include a plurality of unit cells connected in series or in parallel, and the unit cells may be nickel-hydrogen secondary batteries or lithium secondary batteries.
The waterproof battery pack adopts the multi-layer sleeve structure to replace a waterproof structure formed by welding the high-cost plastic pipe and the end cover, so that an ultrasonic welding process is avoided, the cost is reduced, and the waterproof battery pack is particularly suitable for the application with higher requirements on waterproof performance and control of the cost.
While the present utility model has been described with reference to the drawings and the embodiments, the present utility model is not limited to the embodiments described above, and various modifications and element changes may be made without departing from the spirit of the present utility model, and these modifications and element changes are also included in the scope of the present utility model.
Claims (10)
1. A waterproof battery pack, characterized in that: comprising a battery core, a multi-layered sleeve structure covering the battery core, and a wire harness for electrically connecting the battery core with an external device,
the multilayer sleeve structure comprises at least:
a 1 st layer sleeve which covers the whole side surface of the battery core, wherein two ends of the sleeve are respectively caulking on two battery end surfaces of the battery core to form a 1 st caulking part;
two 1 st insulating plates that cover two battery end faces of the battery cell and surfaces of the 1 st caulking portion, respectively;
a layer 2 sleeve which is of a split structure and respectively covers the side surfaces of the upper end part and the lower end part of the layer 1 sleeve, and two ends of the sleeve are respectively calked on the surface of the layer 1 insulating plate to form a layer 2 calked part;
two 2 nd insulating plates covering surfaces of the 1 st insulating plate and the 2 nd caulking portion, respectively;
a 3 rd sleeve covering the entire side surfaces of the 1 st sleeve and the 2 nd sleeve, both ends of which are respectively caulked on the surface of the 2 nd insulating plate to form a 3 rd caulking portion,
the wire harness is disposed on a side of the battery cell with at least a portion thereof between the layer 1 bushing and the layer 3 bushing.
2. The waterproof battery according to claim 1, wherein the wire bundle includes at least a positive electrode wire and a negative electrode wire, one ends of the positive electrode wire and the negative electrode wire are electrically connected to a positive electrode terminal and a negative electrode terminal of the battery cell through a positive electrode guide plate and a negative electrode guide plate, respectively, and the other ends of the positive electrode wire and the negative electrode wire constitute a lead-out terminal electrically connected to an external device.
3. The waterproof battery of claim 2, wherein the lead-out end extends from between the layer 2 sleeve and the layer 3 sleeve to the outside.
4. The waterproof battery according to claim 2, wherein a part of the positive electrode guide plate and the negative electrode guide plate is located between the 1 st insulating plate and the 1 st caulking portion, and another part is located between the 1 st layer socket and the 2 nd layer socket.
5. The waterproof battery of claim 2, wherein the harness further comprises a PTC thermistor disposed adjacent to the positive or negative electrode guide plate between the layer 1 bushing and the layer 2 bushing.
6. The waterproof battery according to claim 1 or 2, wherein no through-holes are provided in both the 1 st insulating plate and the 2 nd insulating plate.
7. The waterproof battery according to claim 1 or 2, wherein the 1 st insulating plate and the 2 nd insulating plate are both PC insulating plates.
8. The waterproof battery of claim 1 or 2, wherein the layer 1 sleeve, the layer 2 sleeve, and the layer 3 sleeve are all PVC heat shrink sleeves.
9. The waterproof battery pack according to claim 1 or 2, wherein the battery cell comprises a plurality of series or parallel single cells.
10. The waterproof battery pack according to claim 9, wherein the single cell is a nickel-hydrogen secondary battery or a lithium secondary battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320674786.XU CN219553792U (en) | 2023-03-31 | 2023-03-31 | Waterproof battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320674786.XU CN219553792U (en) | 2023-03-31 | 2023-03-31 | Waterproof battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219553792U true CN219553792U (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320674786.XU Active CN219553792U (en) | 2023-03-31 | 2023-03-31 | Waterproof battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219553792U (en) |
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2023
- 2023-03-31 CN CN202320674786.XU patent/CN219553792U/en active Active
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