CN220474835U - Battery pack and electronic equipment - Google Patents
Battery pack and electronic equipment Download PDFInfo
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- CN220474835U CN220474835U CN202322127519.3U CN202322127519U CN220474835U CN 220474835 U CN220474835 U CN 220474835U CN 202322127519 U CN202322127519 U CN 202322127519U CN 220474835 U CN220474835 U CN 220474835U
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- wire harness
- battery
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- baffle
- explosion
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Abstract
The application relates to a battery pack and electronic equipment, wherein the battery pack comprises a battery module and a battery bracket, the battery module comprises a battery core, an explosion-proof valve and a wire harness, and the explosion-proof valve is used for discharging electrolyte leaked in thermal runaway of the battery core; the battery support is arranged on the battery module, the battery support comprises a bottom and a partition plate extending upwards from the bottom, the partition plate forms a liquid discharge groove and a wire harness groove at intervals, a through hole is formed in the liquid discharge groove, the explosion-proof valve corresponds to the through hole, leaked electrolyte is discharged out of the battery module through the explosion-proof valve and the through hole, a wire harness is arranged in the wire harness groove, and the partition plate is used for separating the wire harness from the leaked electrolyte. Because the liquid discharge groove and the wire harness groove are separated by the partition plate, the explosion-proof valve arranged in the liquid discharge groove and the wire harness arranged in the wire harness groove can be isolated, when the battery core is in thermal runaway, the partition plate can block the flow of electrolyte when the electrolyte is discharged through the explosion-proof valve, so that the electrolyte is prevented from splashing on the wire harness, and the short circuit of the sampling wire harness is avoided.
Description
Technical Field
The present disclosure relates to battery technology, and in particular, to a battery pack and an electronic device.
Background
The battery is used as an energy source of electronic equipment, and the function and safety of the battery are important. With the progress of technology, the energy density of batteries is increasing, however, high energy density is accompanied by high potential safety hazard. If the battery's environment and thermal control are not appropriate, the battery's internal temperature will be too high, resulting in the battery being in a thermal runaway condition. The large-capacity battery releases a large amount of heat in a very short time once it is thermally out of control, and electrolyte of the battery can be sprayed onto the wire harness, which is liable to cause damage and short circuit of the wire harness.
Disclosure of Invention
In view of the above, it is desirable to provide a battery pack and an electronic device that can prevent an electrolyte from splashing onto a wire harness when thermal runaway occurs in a battery cell, thereby avoiding a wire harness short circuit.
In a first aspect, the present application provides a battery pack comprising: the battery module comprises a plurality of battery cores;
the explosion-proof valve is arranged inside the battery module and is used for discharging electrolyte leaked in thermal runaway of the battery cell;
the wire harness is electrically connected with the plurality of electric cores and is used for transmitting control signals;
the battery support is arranged on the battery module, the battery support comprises a bottom and a partition plate extending upwards from the bottom, the partition plate is used for forming a liquid discharge groove and a wire harness groove at intervals, a through hole is formed in the liquid discharge groove, the explosion-proof valve corresponds to the through hole, leaked electrolyte passes through the explosion-proof valve and is discharged out of the battery module through the through hole, the wire harness is contained in the wire harness groove, and the partition plate is used for separating the wire harness and the leaked electrolyte.
In one embodiment, a plurality of through holes are formed in the drain groove, the through holes are arranged at intervals, a plurality of explosion-proof valves are arranged, and the explosion-proof valves are arranged in one-to-one correspondence with the through holes;
each through hole is provided with a first baffle on two sides, and the first baffle is used for dividing two adjacent through holes.
In one embodiment, the battery pack further includes an upper cover, the upper cover covers the battery support, a second baffle is disposed on the upper cover, and when the upper cover covers the battery support, the second baffle and the first baffle extend in opposite directions.
In one embodiment, two first baffles are disposed on a side close to one side of two adjacent through holes, the two first baffles are disposed at intervals to form a baffle gap, and the second baffle is disposed at the position of the baffle gap.
In one embodiment, the first and second baffles at least partially overlap in a direction from the upper cover to the battery support.
In one embodiment, the upper cover is provided with guide parts, the guide parts are positioned at two sides of the second baffle plate, and the thickness of the guide parts gradually increases in a direction approaching the second baffle plate so as to form an inclined guide surface, and the guide surface is used for guiding the electrolyte to flow in the direction of the second baffle plate.
In one embodiment, the upper cover further comprises a main body and a plurality of ribs extending from the main body, the plurality of ribs are arranged in an array, and at least part of the ribs form mounting grooves corresponding to the liquid discharge grooves and the harness grooves.
In one embodiment, the harness grooves comprise two harness grooves, and the two harness grooves are respectively arranged on two sides of the drain groove;
in the wire harness groove, a baffle groove is formed in the baffle plate far away from the liquid discharge groove, and the wire harness is accommodated in the wire harness groove after penetrating through the baffle groove from the outer side of the wire harness groove.
In one embodiment, a wire harness fixing member is disposed in the wire harness groove, the wire harness fixing member is an elastic member, one end of the wire harness fixing member is connected with the partition board, and the other end of the wire harness fixing member is a free end.
In a second aspect, the present application also provides an electronic device comprising a battery pack as described above.
The battery pack comprises a battery module, an explosion-proof valve, a wire harness and a battery bracket, wherein the battery module comprises a plurality of electric cores, the explosion-proof valve is arranged inside the battery module and is used for discharging electrolyte of thermal runaway evil of the electric cores, and the wire harness is electrically connected with the electric cores and is used for transmitting control signals; the battery support sets up on the battery module, the battery support include the bottom with from the baffle that the bottom upwards extends, the baffle will battery support interval forms drainage groove and pencil groove, be provided with the through-hole in the drainage groove, the explosion-proof valve corresponds the through-hole sets up, the leakage the electrolyte passes through the explosion-proof valve reaches the through-hole is discharged the battery module, the pencil groove is interior to have had the pencil, the baffle is used for with the pencil and the leakage the electrolyte is separated. Because the liquid drain groove and the wire harness groove are separated by the partition plate, the explosion-proof valve arranged at the position of the liquid drain groove and the wire harness arranged in the wire harness groove can be isolated, when the battery core is in thermal runaway, the partition plate can block the flow of electrolyte when the electrolyte is leaked through the explosion-proof valve, so that the electrolyte is prevented from splashing on the wire harness, and the short circuit of the wire harness is avoided.
Drawings
Fig. 1 is a schematic front view of a battery pack according to an embodiment of the present disclosure;
fig. 2 is a schematic top view of a battery pack with an upper cover removed according to an embodiment of the present disclosure;
FIG. 3 is an enlarged schematic view of the battery pack shown in FIG. 1 in position A;
fig. 4 is a schematic view of the upper cover structure of the battery pack shown in fig. 1;
fig. 5 is a schematic view showing a sectional structure along the vertical direction of the battery pack shown in fig. 1;
fig. 6 is another sectional partial structure view along the vertical direction of the battery pack shown in fig. 1.
Reference numerals in the embodiments of the present application are described below:
the battery pack 100, the battery module 101, the wire harness 102, the battery holder 103, the battery cell 111, the aluminum row 112, the wire harness port 113, the bottom 131, the partition 132, the drain tank 133, the wire harness tank 134, the through hole 135, the wire harness fixing member 136, the side wall 130, the accommodation tank 1300, the battery cell tank 1301, the first baffles 137, 1371 and 1372, the baffle gap 1370, the upper cover 104, the second baffle 141, the baffle gap 1370, the upper cover 104, the main body 142, the rib 143, and the mounting tank 1413.
Referring to fig. 1 together, fig. 1 is a schematic front view of a battery pack according to an embodiment of the present disclosure. As shown in fig. 1, a battery pack 100 of the present embodiment includes a battery module 101, an explosion-proof valve (not shown), a wire harness 102, and a battery holder 103.
The battery module 101 includes a plurality of battery cells 111, and the plurality of battery cells 111 are arranged in an array. The battery cell 111 includes an aluminum-case battery cell, a soft-pack battery cell (also called "polymer battery cell"), a cylindrical battery cell, and the like. The cell 111 includes a positive electrode and a negative electrode. Typically, the positive electrode of the cell 111 and the negative electrode of the adjacent cell 111 may be electrically connected to connect the cells 111 in series to supply electric power to the outside together. Alternatively, the positive and negative electrodes of adjacent cells 111 may be connected in series by an aluminum row 112.
An explosion-proof valve for discharging gas generated by thermal runaway of the battery cell 111 and leaked electrolyte is provided inside the battery module 101. Specifically, when thermal runaway occurs in the battery cell 111, a lot of gas is rapidly generated, and when the air pressure inside the battery module 101 is greater than the preset pressure value of the explosion-proof valve, the explosion-proof valve is opened, and the gas can be discharged from the explosion-proof valve to the outside of the battery module 101. Further, when the battery cell 111 is out of control, burst occurs, and the electrolyte breaks through the protective layer of the battery cell 111 and leaks to the outside of the explosion-proof valve under stronger air pressure.
The wire harness 102 is electrically connected to a plurality of the electric cores 111, and the wire harness 102 is used for transmitting control signals. The wiring harness 102 may be classified into a high-voltage wiring harness and a low-voltage wiring harness according to the difference of transmission signals. The high voltage harness and the low voltage harness are distinguished by the magnitude of their transmitted voltages, for example, when the battery pack 100 is applied to a new energy vehicle, the low voltage harness is typically used to transmit voltages of about 12V, and the voltage transmitted by the high voltage harness is much greater than 12V. The cross-sectional area of the high voltage harness is much larger than the cross-sectional area of the voltage harness.
Referring also to fig. 3, in an alternative embodiment, a plurality of harness ports 113 may be provided on the aluminum row 112, and the harness 102 is electrically connected to the electrical cells 111 through the harness ports 113.
The battery support 103 is arranged on the battery module 101, the battery support 103 comprises a bottom 131 and a partition 132 extending upwards from the bottom 131, the partition 132 is used for forming a liquid discharge groove 133 and a wire harness groove 134 at intervals of the battery support 103, a through hole 135 is formed in the liquid discharge groove 133, the explosion-proof valve is arranged corresponding to the through hole 135, leaked electrolyte is discharged out of the battery module 101 through the explosion-proof valve and the through hole 135, the wire harness 102 is contained in the wire harness groove 134, and the partition 132 is used for separating the wire harness 102 from the leaked electrolyte.
Referring to fig. 2 and 3 together, the battery holder 103 further includes a side wall 130, and the side wall 130 extends upward at two opposite sides of the bottom 131 to define a receiving space 1300. The partition 132 includes four partitions disposed in the receiving groove 1300 and dividing the battery holder 103 into one drain groove 133, two wire harness grooves 134, and a cell groove 1301. The two outermost separators 132 and the side walls 130 on both sides form a cell groove 1301, the two separators 132 in the middle position form two harness grooves 134 with the two outermost separators 132, and a drain groove 133 is formed between the two separators 132 in the middle position. That is, the drain grooves 133 are provided at the middle position of the battery holder 103, the two harness grooves 134 are provided at both sides of the drain grooves 133, the two cell grooves 1301 are provided at the sides of the harness grooves 134 away from the drain grooves 133, respectively, and the cell grooves 1301 are provided at the outermost positions of the battery holder 103.
The battery cell 111 is arranged corresponding to the wire groove 1301, and the wire harness 102 of the battery cell 111 can be directly accommodated in the adjacent wire harness groove 134, so that the wire harness 102 of the battery cell 111 can be accommodated in the wire harness groove 134 conveniently. In order to further facilitate the accommodating and mounting of the wire harness 102, in the wire harness groove 134, a partition plate groove 1302 is formed in the partition plate 132 far from the drain groove 133, that is, the partition plate 132 between the wire harness groove 134 and the electric core groove 1301 is provided with the partition plate groove 1302, the partition plate groove 1302 corresponds to the wire harness port 113 on the aluminum row 112, the wire harness 102 is accommodated in the wire harness groove 133 after passing through the partition plate groove 1302 from the outer side of the wire harness groove 134, that is, the wire harness 102 can pass through the partition plate groove 1302 to enter the wire harness groove 134 after being led out from the electric core 111 through the wire harness port 113.
Optionally, a plurality of spaced through holes 135 are provided in the drain groove 133, each through hole 135 is provided at intervals, the explosion-proof valves are provided in plurality, and each explosion-proof valve is provided in one-to-one correspondence with each through hole 35.
In a specific embodiment, the explosion-proof valve is assembled in the through hole 135, and if the explosion-proof valve is clamped in the through hole 135, the inner diameter of the through hole 135 and the outer diameter of the explosion-proof valve can be set to be equal, so that the through hole 135 and the explosion-proof valve are assembled tightly. The inner diameter of the through hole 135 may also be set smaller than the outer diameter of the explosion proof valve such that the through hole 135 and the explosion proof valve are interference fit. It should be understood that the through-hole 135 is tightly fitted with the explosion-proof valve regardless of whether the inner diameter of the through-hole 135 is equivalent to the outer diameter of the explosion-proof valve or the inner diameter of the through-hole 135 is smaller than the outer diameter of the explosion-proof valve, thereby preventing the electrolyte discharged from the explosion-proof valve from flowing back into the inside of the battery module 101.
In another specific embodiment, an explosion-proof valve may also be disposed below the through hole 135 and disposed corresponding to the through hole 135. The inner diameter of the through hole 135 may be set to be equal to the outer diameter of the explosion-proof valve, so that it is ensured that the electrolyte discharged from the explosion-proof valve can be completely sprayed out through the through hole 135, and it is avoided that the sprayed electrolyte is not received by the bottom 131 of the drain groove 133 due to the excessively large through hole 135, thereby returning to the inside of the flow battery module 101.
Optionally, a first baffle 137 is disposed on two sides of each through hole 135, and the first baffle 137 is used to separate two adjacent through holes 135. The electrolyte sprayed from the through holes 135 is prevented from flowing into the adjacent through holes 135.
In a specific embodiment, a specific two adjacent through holes 135 are described as an example. Two first baffles 137 are disposed on a side close to one side of two adjacent through holes 135, and two first baffles 137 are disposed at intervals to form a baffle gap 1370, as shown in fig. 2, two first baffles 1371 and 1372 are disposed on a side close to one side of two adjacent through holes 135, and the first baffles 1371 and 1372 are disposed at intervals to form the baffle gap 1370. Thus, even if the electrolyte ejected from a certain through hole 135 is ejected outward beyond the position of the first baffle 137 of that through hole 135, further flow into the adjacent through hole 135 can be blocked by the first baffle 137 of the adjacent through hole 135.
In another specific embodiment, to save the cost of the first baffle 137, a first baffle 137 may be shared between two adjacent through holes 135.
Optionally, referring to fig. 5, the battery pack 100 further includes an upper cover 104, where the upper cover 104 covers the battery support 103. The upper cover 104 is provided with a second damper 141, and when the upper cover 104 is closed to the battery holder 103, the second damper 141 and the first damper 137 extend in opposite directions, and the second damper 141 is provided at a position of the damper gap 1370.
In practice, when the electrolyte is sprayed through the through holes 135, part of the electrolyte is sprayed onto the upper cover 104 and flows to the second barrier 141 along both sides of the upper cover 104, and further flows into the barrier gap 1370 under the guidance of the second barrier 141. Thereby blocking further flow of electrolyte into adjacent through holes 135.
Optionally, the first baffle 137 and the second baffle 141 at least partially overlap in a direction from the upper cover 104 to the battery holder 103. Thereby, it can be further ensured that the electrolyte can smoothly flow into the barrier gap 1370 along the second barrier 141. In practical applications, during thermal runaway of the battery cell 111, the battery pack 100 may be in a shaking state due to impact vibration of gas generated by the battery cell 111 or shaking effect of other external forces, and in this state, the electrolyte flowing onto the second baffle 141 may follow the shaking, and if the second baffle 141 is set to be shorter, i.e. the length extending toward the first baffle 137 is shorter, the electrolyte may splash to other positions at the lowest end position of the second baffle 141 due to the shaking forces, and may not be guaranteed to flow smoothly into the baffle gap 1370. The present application solves the above-mentioned problems by providing a first barrier 137 and the second barrier 141 to at least partially overlap in the direction from the upper cover 104 to the cell holder 103.
In a specific embodiment, as shown in fig. 5, the first baffle 137 and the second baffle 141 partially overlap in the direction from the upper cover 104 to the battery holder 103.
In another specific embodiment, the first baffle 137 and the second baffle 141 may be further provided to entirely overlap in a direction from the upper cover 104 to the battery holder 103. That is, when the upper cover 104 and the battery holder 103 are assembled, the first and second shutters 137 and 141 are respectively abutted to the bottom of the upper cover 104 (a main body 142 described below) and the bottom 131 of the battery holder 103.
Referring to fig. 6, optionally, the upper cover 104 is provided with guide portions 144, the guide portions 144 are located at two sides of the second baffle 141, and the thickness of the guide portions 144 gradually increases in a direction approaching the second baffle 141 to form an inclined guide surface for guiding the electrolyte to flow in the direction of the second baffle 141. That is, when the upper cover 104 and the battery holder 103 are assembled, the distance between the guide surface and the bottom 131 of the battery holder 103 is gradually reduced, and the guide surface is gradually reduced in a direction approaching the second barrier 141. The guide surface may further guide the electrolyte on the upper cover 104 to flow in the direction of the second barrier 141.
Optionally, as shown in fig. 4, the upper cover 104 further includes a main body 142 and a plurality of ribs 143 extending from the main body 142, the plurality of ribs 143 are arranged in an array, and at least part of the ribs 143 form mounting grooves 1413 corresponding to the drain grooves 133 and the harness grooves 134. Thus, after the electrolyte sprayed from the through holes 135 splashes onto the upper cover 104, the mounting grooves 1413 formed by the ribs 143 of the upper cover 104 block the electrolyte from flowing to other mounting grooves, and can be guided into the gap 1370 by the guide surface.
Optionally, the upper cover 104 and the battery holder 103 are snap-fit, and it should be understood that in other embodiments, the two may be bonded, welded, etc.
Alternatively, referring to fig. 3, a wire harness fixing member 136 is disposed in the wire harness groove 134, the wire harness fixing member 136 is disposed at a distance from the bottom 131, and the wire harness 102 is disposed between the wire harness fixing member 136 and the bottom 131.
More specifically, the harness fixing member 136 is an elastic member, and one end of the harness fixing member 136 is connected to the partition 132, and the other end of the harness fixing member 136 is a free end.
The application also provides an electronic device comprising the battery pack according to any one of the preceding claims. The electronic device may include a new energy automobile, such as a home new energy automobile, a commercial new energy automobile, etc., and may also include a new energy ship, a new energy mobile robot, etc.
In summary, the battery pack of the application comprises a battery module, an explosion-proof valve, a wire harness and a battery bracket, wherein the battery module comprises a battery core, the explosion-proof valve is used for discharging electrolyte leaked in thermal runaway from the battery core, and the wire harness is electrically connected with the battery core and used for transmitting control signals; the battery support is arranged on the battery module, the battery support comprises a bottom and a partition plate extending upwards from the bottom, the partition plate is used for forming a liquid discharge groove and a wire harness groove at intervals, a through hole is formed in the liquid discharge groove, the explosion-proof valve corresponds to the through hole, leaked electrolyte passes through the explosion-proof valve and is discharged out of the battery module through the through hole, the wire harness is contained in the wire harness groove, and the partition plate is used for separating the wire harness and the leaked electrolyte. Because the liquid discharge groove and the wire harness groove are separated by the partition plate, the explosion-proof valve arranged in the liquid discharge groove and the wire harness arranged in the wire harness groove can be isolated, when the battery core is in thermal runaway, the partition plate can block the flow of electrolyte when the electrolyte is discharged through the explosion-proof valve, so that the electrolyte is prevented from splashing on the wire harness, and the short circuit of the sampling wire harness is avoided.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. A battery pack, comprising:
the battery module comprises a plurality of battery cores;
the explosion-proof valve is arranged inside the battery module and is used for discharging electrolyte leaked in thermal runaway of the battery cell;
the wire harness is electrically connected with the plurality of electric cores and is used for transmitting control signals;
the battery support is arranged on the battery module, the battery support comprises a bottom and a partition plate extending upwards from the bottom, the partition plate is used for forming a liquid discharge groove and a wire harness groove at intervals, a through hole is formed in the liquid discharge groove, the explosion-proof valve corresponds to the through hole, leaked electrolyte passes through the explosion-proof valve and is discharged out of the battery module through the through hole, the wire harness is contained in the wire harness groove, and the partition plate is used for separating the wire harness and the leaked electrolyte.
2. The battery pack according to claim 1, wherein a plurality of through holes are formed in the drain groove, the through holes are arranged at intervals, a plurality of explosion-proof valves are arranged, and the explosion-proof valves are arranged in one-to-one correspondence with the through holes;
each through hole is provided with a first baffle on two sides, and the first baffle is used for dividing two adjacent through holes.
3. The battery pack of claim 2, further comprising an upper cover that covers the battery support, the upper cover being provided with a second baffle, the second baffle and the first baffle extending in opposite directions when the upper cover covers the battery support.
4. A battery pack according to claim 3, wherein two first baffles are provided on a side close to one side of two adjacent through holes, the two first baffles being disposed at intervals to form a baffle gap, and the second baffle being disposed at a position of the baffle gap.
5. The battery pack of claim 3 or 4, wherein the first and second baffles at least partially overlap in a direction from the upper lid to the battery support.
6. A battery pack according to claim 3, wherein the upper cover is provided with guide portions which are located on both sides of the second barrier, and the thickness of the guide portions is gradually increased in a direction approaching the second barrier to form inclined guide surfaces for guiding the electrolyte to flow in the direction of the second barrier.
7. The battery pack according to claim 3, wherein the upper cover further comprises a main body and a plurality of ribs extending from the main body, a plurality of the ribs are arranged in an array, and at least part of the ribs form mounting grooves corresponding to the drain grooves and harness grooves.
8. The battery pack according to claim 1, wherein the harness grooves include two, the two harness grooves being provided on both sides of the drain groove, respectively;
in the wire harness groove, a baffle groove is formed in the baffle plate far away from the liquid discharge groove, and the wire harness is accommodated in the wire harness groove after penetrating through the baffle groove from the outer side of the wire harness groove.
9. The battery pack according to claim 1, wherein a wire harness fixing member is provided in the wire harness groove, the wire harness fixing member is an elastic member, one end of the wire harness fixing member is connected with the separator, and the other end of the wire harness fixing member is a free end.
10. An electronic device comprising a battery pack according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322127519.3U CN220474835U (en) | 2023-08-08 | 2023-08-08 | Battery pack and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322127519.3U CN220474835U (en) | 2023-08-08 | 2023-08-08 | Battery pack and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN220474835U true CN220474835U (en) | 2024-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322127519.3U Active CN220474835U (en) | 2023-08-08 | 2023-08-08 | Battery pack and electronic equipment |
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| CN (1) | CN220474835U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119069940A (en) * | 2024-11-04 | 2024-12-03 | 双一力(宁波)电池有限公司 | A CCS device, battery module, battery pack and electrical equipment |
-
2023
- 2023-08-08 CN CN202322127519.3U patent/CN220474835U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119069940A (en) * | 2024-11-04 | 2024-12-03 | 双一力(宁波)电池有限公司 | A CCS device, battery module, battery pack and electrical equipment |
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