CN219144387U - Battery upper cover assembly, battery shell, battery and battery pack - Google Patents

Abstract

The utility model provides a battery upper cover assembly, a battery shell, a battery and a battery pack, and belongs to the technical field of batteries. The battery upper cover assembly comprises an insulating heat conduction cover plate, the insulating heat conduction cover plate is provided with a first lug leading-out area and a second lug leading-out area, the first lug leading-out area and the second lug leading-out area are respectively provided with a plurality of insulating heat conduction pieces, a first fixing clamping groove is arranged between the first lug leading-out area and the second lug leading-out area, and the first fixing clamping groove extends along the width direction of the upper cover assembly and is used for fixedly arranging a first heat transfer device. The battery cell tab terminal can conduct heat through the insulating heat conducting piece, the temperature inside the battery can be balanced, and the first heat transfer device can be fixedly connected to the first fixing clamping groove, so that the heat inside the battery can be timely conducted out, thermal runaway of the battery is prevented, and the safety of the battery is improved.

Description

Battery upper cover assembly, battery shell, battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery upper cover assembly, a battery shell, a battery and a battery pack.

Background

With the further development of the energy storage field of lithium ion batteries in recent years, the safe use of lithium ion batteries is also receiving attention. Because of the principle and structural characteristics of lithium ion batteries, large heat is often generated due to internal resistance heating in the repeated use process, the heat can be gradually increased, if the accumulated heat is not effectively emitted, the temperature can be further increased, when the temperature reaches the limit, the heat balance of the battery can be destroyed, a series of self-heating side reactions are initiated, a large amount of combustible gas is generated, a thermal runaway phenomenon occurs, the internal ignition of the battery can be finally caused, and explosion is initiated in severe cases. The temperature inside the battery is not balanced, and for the soft package electric core in the battery, the tab end of the soft package electric core is thermal gathering place, if not in time derive the heat then easily take place thermal runaway, causes the hidden danger to user's personal safety.

CN114597537a discloses a battery module structure comprising a plurality of exhaust channels, a profile plate and an energy storage unit. The exhaust channels are arranged at the bottom of the lower box body independently; the shaping plate is fixedly connected to the lower box body and seals the exhaust passages, and the shaping plate comprises a plurality of radiating holes which are communicated with the exhaust passages; the energy storage unit comprises a plurality of electric cores which are fixedly connected with the profiling plate and correspond to the heat dissipation holes one by one. The patent does not design the position of the fixed heat transfer device on the cover plate, and the heat dissipation position is far away from the lug end of the battery cell, so that the heat dissipation efficiency is low.

CN114665191a discloses a battery pack with a function of preventing heat spreading, comprising a bottom plate, a battery plugboard and the like; a liquid guide groove is arranged between the bottom plate and the battery plugboard. When the single battery is in thermal runaway, the cooling liquid is heated, boosted and expanded, and upwards gushes up to the inner part of the battery plugboard to surround the single battery, meanwhile, the hot frit in the pressure relief seat is heated and melted, so that the cooling liquid is sprayed on the surface of the single battery to physically cool the single battery, during the period, the hot gas generated by the cooling liquid triggers the locking component to unlock the emergency pressure relief component, hot gas in the battery pack is accumulated and high pressure is generated, the emergency pressure relief component on the cover board is upwards rushed, and the accumulated hot gas in the battery pack is timely and emergently evacuated. The patent adopts the mode that the cooling liquid is sprayed on the surface of the single cell to cool, is a remedial measure after the occurrence of thermal runaway, can not fundamentally reduce the risk of the thermal runaway of the battery, and can not dissipate the heat generated in the normal operation process of the battery.

Disclosure of Invention

In order to solve the problems that the internal temperature of a battery is unbalanced, the heat of the lug end of a battery core is difficult to conduct out, and the risk of thermal runaway is easy to cause, the utility model provides a battery upper cover assembly, a battery and a battery pack.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

the utility model provides a battery upper cover subassembly, includes insulating heat conduction apron, insulating heat conduction apron is provided with first utmost point ear and draws out the district with the second utmost point ear, first utmost point ear draws out the district and is provided with a plurality of insulating heat conduction spare respectively with the second utmost point ear draws out the district, be provided with first fixed draw-in groove between first utmost point ear draws out the district and the second utmost point ear draws out the district, first fixed draw-in groove is followed battery upper cover subassembly's width direction extends for fixed first heat transfer device that sets up.

Preferably, a gap is arranged between the insulating heat conducting members in the first tab leading-out area along the width direction of the upper cover assembly, so that the tab of the battery cell extends out of the insulating heat conducting member from the gap and is bent at the top of the insulating heat conducting member.

Preferably, the insulating heat conducting member is provided with a second fixing slot, and the second fixing slot extends along the length direction of the upper cover assembly and is used for fixedly arranging a second heat transfer device.

Preferably, the battery upper cover assembly is an aluminum nitride upper cover assembly, and the insulating heat conducting piece and the first fixing clamping groove are integrally arranged.

Preferably, the upper cover comprises a cylinder body and the upper cover assembly.

The utility model also provides a battery, which comprises the battery shell and a plurality of soft package battery cells, wherein the soft package battery cells are arranged in the battery shell, the insulating heat conducting piece extends into the battery shell and presses the lug ends of the soft package battery cells, and the lugs of the soft package battery cells extend out of the insulating heat conducting piece from the gaps and are bent at the tops of the insulating heat conducting pieces.

Preferably, the insulating heat conducting member abuts against one end of the soft package battery core and the shape of the lug end of the soft package battery core is matched, so that the insulating heat conducting member is tightly attached to the soft package battery core.

Preferably, the battery cooling device further comprises a second heat transfer device, wherein the second heat transfer device is fixedly arranged in the second fixing clamping groove, and the second heat transfer device is a heat pipe or a heat conducting ceramic rod and is used for balancing the temperature of the battery.

The utility model also provides a battery pack, which comprises at least two batteries and further comprises a first heat transfer device, wherein the first fixing clamping groove of each battery is connected into an integral fixing clamping groove, the first heat transfer device is fixedly arranged in the integral fixing clamping groove and connected with a heat dissipation device, and the first heat transfer device is a heat pipe or a liquid cooling pipe and is used for conducting heat of the battery to the heat dissipation device and timely dissipating the heat.

Compared with the prior art, the utility model has the beneficial effects that:

1. the battery upper cover component can conduct the lug end of the battery core to generate heat through the insulating heat conducting piece, so that the temperature inside the battery can be balanced, and the first fixing clamping groove can be fixedly connected with the first heat transfer device, so that the heat inside the battery can be conducted out in time, the battery is prevented from thermal runaway, and the safety of the battery is improved;

2. the first fixing clamping groove of the upper cover assembly of the battery is formed in the first end face of the upper cover assembly and is arranged along the center line of the width direction of the upper cover assembly, the distance between the first fixing clamping groove and the first tab leading-out area is uniform with the distance between the first tab leading-out area and the second tab leading-out area, and when the first heat transfer device is arranged in the first fixing clamping groove, the battery heat can be evenly dissipated.

3. A gap is formed between the insulating heat conducting pieces in the first tab leading-out area along the width direction of the upper cover assembly, so that the tabs of the battery cells extend out of the insulating heat conducting pieces from the gap and are bent at the tops of the insulating heat conducting pieces, and the effect of fixing the tabs of the cells is achieved.

4. The insulating heat conducting piece is provided with the second fixing clamping groove, and when the second heat transfer device is arranged in the second fixing clamping groove, heat at the lug end of the battery cell is conducted to the first fixing clamping groove, so that the heat is conducted out through the first heat transfer device.

5. The insulating heat conducting piece and the first fixing clamping groove are integrally arranged, so that the heat conducting efficiency is high, the structure is simple, the process is simple and convenient, and the cost is saved.

6. One end of the insulating heat conducting piece, which is pressed against the soft package battery core, is matched with the shape of the lug end of the soft package battery core, so that the insulating heat conducting piece is tightly attached to the soft package battery core.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an upper cover assembly, a battery case, and a battery according to an embodiment of the present utility model;

fig. 2 is an exploded view of the upper cover assembly, the battery case, and the battery according to the embodiment of the present utility model.

Reference numerals:

11-first tab lead-out area, 12-second tab lead-out area, 13-first fixing clamping groove, 2-insulating heat conducting piece, 21-second fixing clamping groove, 3-first heat transfer device, 4-second heat transfer device, 5-electric core and 51-electric core tab end.

Detailed Description

The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

The terms first and second and the like in the description and in the claims of embodiments of the utility model, are used for distinguishing between different objects and not necessarily for describing a particular sequential order of objects. For example, the first and second blocks, etc. are used to distinguish between different blocks, and are not used to describe a particular sequence of blocks.

In the description of the embodiments of the present utility model, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of elements refers to two elements or more than two elements.

The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, and may mean: there are three cases where the display panel alone exists, the display panel and the backlight exist at the same time, and the backlight exists alone. The symbol "/" herein indicates that the associated object is or is a relationship, e.g., input/output indicates input or output.

In embodiments of the utility model, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Example 1

As shown in fig. 2, the present embodiment provides a battery upper cover assembly, which includes an insulating heat conduction cover plate, wherein the insulating heat conduction cover plate is provided with a first tab leading-out area 11 and a second tab leading-out area 12, the first tab leading-out area 11 and the second tab leading-out area 12 are respectively provided with a plurality of insulating heat conduction pieces 2, a first fixing clamping groove 13 is arranged between the first tab leading-out area 11 and the second tab leading-out area 12, and the first fixing clamping groove 13 extends along the width direction of the upper cover assembly and is used for fixedly arranging a first heat transfer device 3.

In this embodiment, battery upper cover subassembly can conduct electric core tab end through setting up insulating heat conduction spare and produce heat, and the inside temperature of balanced battery, first fixed draw-in groove can fixed connection first heat transfer device to be favorable to in time deriving the inside heat of battery, reduce battery thermal runaway risk, improve the security of battery.

Example 2

As shown in fig. 2, the present embodiment provides a battery upper cover assembly, including an insulating heat conduction cover plate, the insulating heat conduction cover plate is provided with a first tab leading-out area 11 and a second tab leading-out area 12, the first tab leading-out area 11 and the second tab leading-out area 12 are respectively provided with a plurality of insulating heat conducting pieces 2, a first fixing slot 13 is provided between the first tab leading-out area 11 and the second tab leading-out area 12, the first fixing slot 13 is arranged on a first end face of the upper cover assembly, and is arranged along a central line of the width direction of the upper cover assembly for fixedly arranging a first heat transfer device 3. The distance between the first fixing clamping groove and the first tab leading-out area is uniform, and the distance between the first fixing clamping groove and the second tab leading-out area is uniform, so that the heat of the battery can be uniformly dissipated when the first heat transfer device is arranged in the first fixing clamping groove, the thermal runaway risk of the battery is reduced, and the safety of the battery is improved.

In some embodiments, a gap is arranged between the insulating and heat conducting members 2 of the first tab leading-out region 11 along the width direction of the upper cover assembly of the battery, so that the tabs of the battery cells extend out of the insulating and heat conducting members 2 from the gap and are bent at the top of the insulating and heat conducting members 2, and the function of fixing the tabs of the battery cells is achieved.

In some embodiments, the insulating and heat conducting member 2 is provided with a second fixing groove 21, and the second fixing groove 21 extends along the length direction of the upper cover assembly of the battery, for fixedly providing the second heat transfer device 4. When the second heat transfer device is arranged in the second fixing clamping groove, heat at the lug end of the battery cell is conducted to the first fixing clamping groove, and accordingly the heat is conducted out through the first heat transfer device.

In some embodiments, the battery upper cover assembly is an aluminum nitride upper cover assembly, and the insulating and heat conducting member 2 and the first fixing clip groove 13 are integrally provided. Compared with the upper cover components of the battery made of other materials, the upper cover component of aluminum nitride has good heat conductivity, high structural strength and lower cost; the insulating heat conducting piece and the first fixing clamping groove are integrally arranged, so that the heat conducting efficiency is high, the structure is simple, the process is simple and convenient, and the cost is saved.

Example 3

The present embodiment provides a battery case including a can and the battery upper cover assembly of embodiment 1 or 2 described above.

Example 4

As shown in fig. 1 and 2, the present embodiment provides a battery, including a battery housing and a plurality of soft package battery cells in embodiment 3, the soft package battery cells are disposed in the battery housing, the insulating heat conductive member 2 extends into the battery housing and presses the tab end of the soft package battery cells, and the tab of the soft package battery cells extends out of the insulating heat conductive member 2 from the gap and bends at the top of the insulating heat conductive member 2.

In some embodiments, the insulating heat conducting piece 2 presses one end of the soft package battery core to be matched with the shape of the lug end of the soft package battery core, so that the insulating heat conducting piece 2 is tightly attached to the soft package battery core, thereby not only playing a role in fixing, but also improving the heat conducting efficiency of the insulating heat conducting piece, and having better heat conducting effect.

In some embodiments, the battery also comprises a second heat transfer device 4, the second heat transfer device 4 is fixedly arranged in the second fixing clamping groove 21, heat of the battery lug end can be conducted to the first fixing clamping groove, the battery temperature is balanced, heat is led out through the first heat transfer device, the thermal runaway risk is reduced, and the safety of the battery is improved. The second heat transfer device 4 is preferably a heat pipe or a heat conducting ceramic rod, and the heat conducting effect is better than that of other heat transfer devices.

Example 5

As shown in fig. 1 and 2, the present embodiment provides a battery pack, which includes 4 batteries in embodiment 4, and further includes a first heat transfer device 3, where the first fixing slot 13 of each battery is connected to form an integral fixing slot, and the first heat transfer device 3 is fixedly disposed in the integral fixing slot and connected to the heat dissipation device. The first heat transfer device is preferably a heat pipe or a liquid cooling pipe, and has better heat conduction effect than other heat transfer devices, and is used for conducting heat of the battery to the heat dissipation device and timely dissipating the heat. The heat dissipation device is preferably a semiconductor refrigerator, so that heat dissipation and temperature reduction can be realized rapidly, and the heat dissipation efficiency is high.

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 foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not thereby 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 (9)

1. The utility model provides a battery upper cover subassembly, its characterized in that, includes insulating heat conduction apron, insulating heat conduction apron is provided with first utmost point ear and draws out district with the second utmost point ear, first utmost point ear draws out district and second utmost point ear and draws out the district and be provided with a plurality of insulating heat conduction spare respectively, first utmost point ear draws out and is provided with first fixed draw-in groove between district and the second utmost point ear and draws out the district, first fixed draw-in groove is followed battery upper cover subassembly's width direction extends for fixedly set up first heat transfer device.

2. The battery top cover assembly according to claim 1, wherein a gap is provided between the insulating and heat conducting members of the first tab leading-out region in the width direction of the battery top cover assembly, so that the tab of the battery cell extends out of the insulating and heat conducting member from the gap and is bent at the top of the insulating and heat conducting member.

3. The battery top cover assembly according to claim 2, wherein the insulating and heat conducting member is provided with a second fixing groove extending in a length direction of the battery top cover assembly for fixedly disposing a second heat transfer device.

4. The battery top cover assembly of claim 3, wherein the battery top cover assembly is an aluminum nitride top cover assembly, and the insulating and thermally conductive member is integrally provided with the first fixing clip groove.

5. A battery housing comprising a can and the battery cover assembly of claim 4.

6. A battery comprising the battery shell and a plurality of soft package electric cores according to claim 5, wherein the soft package electric cores are arranged in the battery shell, the insulating heat conducting piece extends into the battery shell and presses the lug ends of the soft package electric cores, and the lugs of the soft package electric cores extend out of the insulating heat conducting piece from the gaps and are bent at the tops of the insulating heat conducting pieces.

7. The battery of claim 6, wherein the insulating and heat conducting member presses one end of the soft battery cell to match the shape of the tab end of the soft battery cell, so that the insulating and heat conducting member is tightly attached to the soft battery cell.

8. The battery of claim 7, further comprising a second heat transfer device fixedly disposed within the second fixing clip groove, the second heat transfer device being a heat pipe or a thermally conductive ceramic rod for equalizing the battery temperature.

9. The battery pack comprises at least two batteries according to claim 8, and further comprises first heat transfer devices, wherein the first fixing clamping grooves of each battery are connected into an integral fixing clamping groove, the first heat transfer devices are fixedly arranged in the integral fixing clamping grooves and connected with a heat dissipation device, and the first heat transfer devices are heat pipes or liquid cooling pipes and are used for conducting heat of the batteries to the heat dissipation device and timely dissipating the heat.

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