CN218215617U - Thermal runaway alarm device and battery module - Google Patents

Abstract

The utility model relates to a thermal runaway alarm device and battery module, thermal runaway alarm device include the alarm monitoring casing and be used for connecting the winding displacement connector of the inside winding displacement of module, the alarm monitoring casing is U type structure and has roof and two lateral walls, be equipped with on at least one internal face in roof and two lateral walls the winding displacement connector. Through set up the winding displacement connector on at least one internal face at alarm monitoring casing, can come to diagnose thermal runaway through the winding displacement break-make of integration in battery module inside, receive the impact fusing after thermal runaway triggers, can realize quick timely alarm monitoring's purpose.

Description

Thermal runaway alarm device and battery module

Technical Field

The utility model relates to a power battery thermal runaway technical field, concretely relates to thermal runaway alarm device and battery module.

Background

With the rapid development of electric automobiles, the market has paid more and more attention to the safety problem of the electric automobiles, and the safety and reliability problems of lithium ion electrons must be solved preferentially when the electric automobile industry is developed. Electric core can cause thermal runaway when receiving overcharge, acupuncture, collision, produces a large amount of heats, if protective measures such as not taking the heat dissipation, thermal runaway electric core will be fast to electric core transmission heat on every side, causes a large amount of electric cores to take place interlocking thermal runaway, and then causes the battery package to catch fire or even explode, seriously threatens the problem of personnel's safety. According to the latest national requirements to be published, a battery pack or system should provide a warning signal five minutes before a danger occurs in the passenger compartment due to thermal runaway of individual cells, so as to remind passengers in the vehicle to evacuate as quickly as possible.

The power Battery manufacturer monitors whether thermal runaway is triggered or not by monitoring the voltage and temperature change conditions of a Battery core through a Battery Management System (BMS), the monitoring mode needs to monitor through different dimensions, and meanwhile, multi-factor triggering alarm is needed, so that the situations of false alarm or missed alarm are easy to occur, and the driving experience and safety of passengers are seriously influenced;

the method comprises the following steps that sensors with different functions are added to a power battery pack to achieve thermal runaway and accurate monitoring, wherein a pressure sensor and a gas sensor are more applied, a large amount of gas is generated when a battery core is in thermal runaway, the internal gas pressure and the gas concentration of the battery pack can change, the pressure sensor monitors the thermal runaway through the change of the internal gas pressure of the power battery pack, and the gas sensor monitors the thermal runaway through detecting the concentration of a certain gas in the battery pack, but the thermal runaway cannot be restrained because only a monitoring effect exists in any sensor, so that effective protective measures are required to be added to the battery pack to avoid diffusion, and meanwhile, the price of the sensor is not low due to the chip carried by the sensor, and the problems of frequent supply shortage and the like are faced along with the change of global potential;

the BMS is used for monitoring the thermal runaway, and because the BMS can only detect basic signals such as voltage, temperature and insulation of a battery pack and cannot directly detect whether the thermal runaway occurs, the change conditions of the information such as the voltage and the temperature when the thermal runaway occurs (such as voltage drop rate, temperature difference of the same block, temperature change rate, insulation state of the battery pack, communication state and the like) need to be arranged and combined, in order to avoid false alarm and false alarm, two or more signals are usually monitored simultaneously, but the thermal runaway has certain uncertainty, so the false alarm and the false alarm cannot be completely avoided;

the pressure sensor is used for detecting the air pressure change condition in the battery pack, the elastic sheet is arranged in the battery pack, and the air pressure is identified through the change degree of the elastic sheet, so that the setting of the threshold value of the pressure sensor needs to be proved through a large amount of experiments, and the false alarm is still generated in some special road conditions (such as high-altitude areas, low-altitude areas and longer tunnels);

the gas sensor is the concentration that detects certain gas in the battery package, the luminousness through the different concentration of certain gas realizes detecting, but the gas sensor can only detect certain gas, if need detect more gas, just need a plurality of sensors or integrated sensor to monitor, but if certain module takes place thermal runaway in the position far away from the gas sensor, gas can't stretch to the sensor immediately, then just need a large amount of experiments to detect gaseous kind and the threshold value of detection and verify, if the gas that detects is higher in certain regional environment concentration simultaneously, then also probably can take place the wrong report.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve one kind or several kinds that prior art has technical problem, provide a thermal runaway alarm device and battery module.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a thermal runaway alarm device, includes alarm monitoring casing and is used for connecting the winding displacement connector of the inside winding displacement of module, alarm monitoring casing is U type structure and has roof and two lateral walls, be equipped with on at least one internal face in roof and two lateral walls the winding displacement connector.

The beneficial effects of the utility model are that: through set up the winding displacement connector on at least one internal face at alarm monitoring casing, can come to diagnose thermal runaway through the winding displacement break-make of integration in battery module inside, receive the impact fusing after thermal runaway triggers, can realize quick timely alarm monitoring's purpose.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, at least one of the flat cable connectors is arranged on the inner wall surface of the top wall and the inner wall surfaces of the two side walls.

The beneficial effect of adopting the further scheme is that: although the alarm monitoring shell with the bus bar connector has a certain directional eruption function, the battery core capacity has certain difference, and the eruption uncertainty caused by the difference of the battery core capacity cannot be completely avoided, so that the bus bar connector is arranged on three inner wall surfaces of the alarm monitoring shell of the U-shaped structure, and all-directional, rapid and timely alarm monitoring can be realized.

Further, the end of the top wall or/and the side wall of the alarm monitoring shell extends to form a lug for assembling the bus bar connector.

The beneficial effect of adopting the further scheme is that: through setting up the lug, when the warning monitoring casing that has the winding displacement connector is assembling in the battery module, can avoid producing the interference with electric core stack body.

Further, a groove or a hollow part is formed in the side wall of the alarm monitoring shell, and the thickness of the side wall at the position of the groove is smaller than that of the side wall at the position of the non-groove.

The beneficial effect of adopting the further scheme is that: when battery module takes place thermal runaway, the recess position that warning monitoring casing can be broken through to thermal runaway gas, discharges from the recess position.

Further, the alarm monitoring shell comprises a heat-resistant insulating material layer, a hot melt adhesive layer and an insulating material layer, wherein the hot melt adhesive layer is arranged between the heat-resistant insulating material layer and the insulating material layer, and a module internal flat cable is embedded in the hot melt adhesive layer.

The beneficial effect of adopting the above further scheme is: the top covering layer of the flat cable is a heat-resistant insulating material layer, so that thermal runaway diffusion can be inhibited; the flat cable is embedded in the hot melt adhesive layer to serve as a diagnosis function; the bottom covering layer is an insulating material layer, so that the copper wires and the battery cells of the flat cables can be effectively isolated, and short circuit ignition is avoided.

Further, the whole extending direction perpendicular to assembly of the inside winding displacement of module is in the electric core of the battery cell stack body of alarm monitoring casing is arranged.

The beneficial effect of adopting the further scheme is that: the module is characterized in that the flat cable is vertically arranged with the battery cell, so that the flat cable can be cut off by impact force generated by the battery cell and high-temperature gas when the battery cell is out of control.

The battery module comprises a thermal runaway alarm device, a module shell and a battery cell stacking body, wherein the battery cell stacking body is assembled in the module shell; the alarm monitoring shell is positioned on the inner side of the module shell and buckled on the battery cell stacking body, the top wall of the alarm monitoring shell is arranged corresponding to the top side sealing edge of the battery cell stacking body, and two side walls of the alarm monitoring shell are respectively arranged corresponding to the lug sides of the battery cell stacking body; the winding displacement connector is located one side of the stacking direction of the battery cell stacking body and is connected with the module internal winding displacement of the battery cell stacking body.

The utility model has the advantages that: the utility model discloses a battery module, through setting up the winding displacement connector of being connected with the winding displacement, can come to diagnose thermal runaway through the winding displacement break-make, receives the impact fusing after thermal runaway triggers, can realize the purpose of quick timely warning monitoring.

Further, the module casing is provided with a first containing groove used for containing the winding displacement connector on one of the end plates in the stacking direction of the battery cell stacking body.

The beneficial effect of adopting the above further scheme is: through setting up first storage tank, can pack into this first storage tank with the winding displacement connector, do not influence the whole equipment shaping of module casing.

Further, still be equipped with the sampling subassembly in the module casing, the one end of sampling subassembly is equipped with the sampling connector, the module casing is followed offer on one of them end plate of the stack direction of electricity core stack body and be used for the holding the second storage tank of sampling connector.

The beneficial effect of adopting the above further scheme is: through setting up the second storage tank, can put into this second storage tank with the sampling connector, do not influence the whole assembly shaping of module casing.

Further, the module shell and at least one side plate arranged oppositely on the pole lug side of the battery cell stacking body are provided with an exhaust through hole, and the outer side surface of each side plate is fixed with an insulating flame-retardant layer covering the exhaust through hole.

The beneficial effect of adopting the above further scheme is: through setting up the exhaust through-hole, the gaseous emission of thermal runaway is convenient for. The insulating flame-retardant layer can achieve the purpose of isolating open fire under the condition of not influencing exhaust.

Further, the outer wall surface of the top wall of the alarm monitoring shell is connected with the module shell through a heat conduction structure adhesive, the inner wall surface of the top wall of the alarm monitoring shell is connected with the top side sealing edge of the cell stacking body through a heat conduction structure adhesive, and the inner side surface of the bottom plate of the module shell is connected with the bottom side sealing edge of the cell stacking body through a heat conduction structure adhesive; and an exhaust gap is reserved between each of the two side walls of the alarm monitoring shell and the corresponding tab side of the battery cell stacking body.

The beneficial effect of adopting the further scheme is that: the setting of heat conduction structure glue can make the heat transmit the liquid cooling system fast, dispels the heat fast. The two side walls of the alarm monitoring shell are not in direct contact with the lug sides of the battery cell, a certain gap needs to be kept, the main purpose of the gap is to prevent the situation that the lug is uncertain due to the fact that the battery cell is erupted due to the weak point, meanwhile, the gap needs to guarantee that after the battery cell is out of control, the erupted substances can be effectively contacted with the inner wall surface of the alarm monitoring shell, and the flat cable embedded in the alarm monitoring shell can be effectively cut off and alarm is triggered.

And the bus bar connector is in communication connection with the battery management system through the plug connector.

The beneficial effect of adopting the further scheme is that: the battery management system can monitor the state of the flat cable channel in the alarm monitoring shell in real time, and if thermal runaway occurs, the flat cable is short-circuited inside, and abnormal states can be monitored by the battery management system at the first time and corresponding measures can be taken.

Drawings

Fig. 1 is a schematic perspective view of a thermal runaway alarm device of the present invention;

fig. 2 is a schematic view of the thermal runaway alarm device of the present invention;

FIG. 3 is a schematic view of the connection structure between the flat cable inside the module and the alarm monitoring housing according to the present invention;

fig. 4 is a schematic diagram of a three-dimensional explosion structure of the battery module of the present invention;

fig. 5 is a schematic perspective view of the battery module of the present invention;

fig. 6 is the utility model discloses the inside winding displacement of module is for the structural schematic diagram that arranges of electric core.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an alarm monitoring housing; 11. a top wall; 12. a side wall; 13. a flat cable connector; 14. a lug; 15. a groove; 16. a layer of heat resistant insulating material; 17. a hot melt adhesive layer; 18. arranging wires inside the module; 19. a layer of insulating material;

2. a module housing; 21. a top plate; 22. a base plate; 23. a side plate; 24. an end plate; 25. a first accommodating groove; 26. a second accommodating groove; 27. an exhaust through hole; 28. an insulating flame retardant layer;

3. a sampling component; 31. a sampling connector; 4. a cell stack body; 41. the extreme ear side; 42. the side edge sealing is carried out at the top part; 43. side edge sealing of the bottom; 44. an electric core; 45. a thermal insulation material; 5. and (4) heat-conducting structural adhesive.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 3, the thermal runaway alarm device of the embodiment includes an alarm monitoring housing 1 and a flat cable connector 13 for connecting a flat cable 18 inside a module, where the alarm monitoring housing 1 is a U-shaped structure and has a top wall 11 and two side walls 12, and the flat cable connector 13 is disposed on at least one inner wall surface of the top wall 11 and the two side walls 12. The module internal flat cable can be understood as a lead arranged inside the battery module, and the lead is composed and then integrated inside the battery module according to actual use requirements. Through set up the winding displacement connector on at least one internal face at alarm monitoring casing, can come to diagnose thermal runaway through the winding displacement break-make of integration in battery module inside, receive the impact fusing after thermal runaway triggers, can realize quick timely alarm monitoring's purpose. Adopt the alarm monitoring casing of U type structure, the tank bottom surface of U type structure can with electric core direct contact, can make the top side seal position of electric core more firm through fixing, and in the time of thermal runaway, electric core is difficult to erupt from top side seal, erupts from the utmost point ear side that the structure is weaker more easily.

As shown in fig. 1 to 3, at least one of the bus bar connectors 13 is disposed on the inner wall surface of the top wall 11 and the inner wall surfaces of the two side walls 12. One bus bar connector 13 may be provided on the inner wall surface of the top wall 11, or a plurality of bus bar connectors 13 may be provided. One bus bar connector 13 may be provided on the inner wall surfaces of the two side walls 12, or a plurality of bus bar connectors 13 may be provided. Although the alarm monitoring shell with the bus bar connector has a certain directional eruption function, the electrical core capacity has certain difference, and the eruption uncertainty caused by the difference of the electrical core capacity cannot be completely avoided, so that the bus bar connector is arranged on three inner wall surfaces of the alarm monitoring shell of the U-shaped structure, and all-round, rapid and timely alarm monitoring can be realized.

As shown in fig. 1, the present embodiment can directly mount the bus bar connector 13 on the inner wall surface of the alarm monitoring housing 1. In a preferred embodiment, the alarm monitor housing 1 has a top wall 11 and/or a side wall 12 with a lug 14 extending from an end thereof for mounting a bus bar connector 13. Through setting up the lug, when the warning monitoring casing that has the winding displacement connector is assembling in the battery module, can avoid producing with the electric core stack body and interfere.

A further scheme of this embodiment is, as shown in fig. 1, be equipped with recess 15 or fretwork on the lateral wall 12 of alarm monitoring casing 1, for example can all set up recess 15 on two lateral walls of alarm monitoring casing 1, also can all set up the fretwork, or set up recess 15 on a lateral wall, set up the fretwork on another lateral wall, or all be provided with recess 15 and fretwork on two lateral walls. When the alarm monitoring shell 1 is provided with the groove 15, the thickness of the side wall of the position of the groove 15 is smaller than that of the side wall of the position of the non-groove. When battery module takes place thermal runaway, the recess position of warning monitoring casing can be broken through to thermal runaway gas, discharges from the recess position.

As shown in fig. 3, the alarm monitoring casing 1 of the present embodiment includes a heat-resistant insulating material layer 16, a hot-melt adhesive layer 17 and an insulating material layer 19, wherein the hot-melt adhesive layer 17 is disposed between the heat-resistant insulating material layer 16 and the insulating material layer 19, and a module internal cable 18 is embedded in the hot-melt adhesive layer 17. The top cover layer of the module internal flat cable 18 is a heat-resistant insulating material layer 16, which can inhibit the diffusion of thermal runaway; the flat cable is embedded in the hot melt adhesive layer 17 to be used as a diagnosis function; the bottom covering layer is an insulating material layer 19, so that copper wires and electric cores of the flat cables can be effectively isolated, and short circuit ignition is avoided.

Specifically, mica can be used as the heat resistant insulating material layer 16, and the heat resistant insulating material layer 16 is mainly used for inhibiting the thermal runaway from diffusing. Taking mica as an example, HP-5 hard high-temperature resistant mica powder plate: the temperature of the paint can be kept at 500 ℃ under the condition of continuous use and can be kept at 850 ℃ under the condition of intermittent use; HP-8 hardness high temperature resistant gold mica plate: the temperature of the paint can be kept at 850 ℃ under the condition of continuous use and can be kept at 1050 ℃ under the condition of intermittent use. The insulating material layer 19 can be made of an insulating material, for example, PI material, which has good insulating property and can continuously work in an environment of 300 ℃.

In a preferred embodiment of the present invention, the overall extending direction of the module internal flat cable 18 is perpendicular to the electric cores 44 of the electric core stacked body 4 assembled in the alarm monitoring housing 1. The module is characterized in that the flat cable is vertically arranged with the battery cell, so that the flat cable can be cut off by impact force generated by the battery cell and high-temperature gas when the battery cell is out of control.

As shown in fig. 4 to fig. 6, this embodiment further provides a battery module, which includes the thermal runaway alarm device, and further includes a module case 2 and a cell stack 4, where the cell stack 4 is assembled in the module case 2; the alarm monitoring shell 1 is located on the inner side of the module shell 2 and buckled on the battery cell stacking body 4, the top wall 11 of the alarm monitoring shell 1 is arranged corresponding to the top side sealing edge 42 of the battery cell stacking body 4, and the two side walls 12 of the alarm monitoring shell 1 are arranged corresponding to the lug sides 41 of the battery cell stacking body 4 respectively; the flat cable connector 13 is located on one side of the stacking direction of the cell stack body 4 and is connected to the module internal flat cable 18 of the cell stack body 4. The battery module of this embodiment, through setting up the winding displacement connector of being connected with the winding displacement, can come to diagnose thermal runaway through the winding displacement break-make, receives the impact fusing after thermal runaway triggers, can realize quick timely warning monitoring's purpose.

As shown in fig. 4, the module housing 2 of the present embodiment includes a top plate 21, a bottom plate 22, side plates 23, and end plates 24, wherein the top plate 21, the bottom plate 22, the side plates 23, and the end plates 24 surround to form a square module housing 2. The end plates 24 are provided at both ends of the cell stack body 4 in the stacking direction of the cell stack body 4. The side plates 23 are respectively provided on the tab sides 41 of the cell stack 4. The top plate 21 and the bottom plate 22 are provided at the positions of the top side edge seal 42 and the bottom side edge seal 43 of the cell stack body 4, respectively. Alarm monitoring casing 1 sets up the inboard of roof 21, and glue 5 and be connected with roof 21 through heat conduction structure.

As shown in fig. 4 and 5, a first accommodating groove 25 for accommodating the bus bar connector 13 is opened on one end plate 24 of the module case 2 along the stacking direction of the cell stack body 4. When the top wall 11 and the side wall 12 of the alarm monitoring housing 1 are both provided with the flat cable connector 13, three sides of the end plate 24 may be provided with a first accommodating groove 25. Through setting up first storage tank, can pack into this first storage tank with the winding displacement connector, do not influence the whole equipment shaping of module casing.

As shown in fig. 4, a sampling assembly 3 is further disposed in the module housing 2 of this embodiment, a sampling connector 31 is disposed at one end of the sampling assembly 3, and a second receiving groove 26 for receiving the sampling connector 31 is disposed on one of the end plates 24 of the module housing 2 along the stacking direction of the cell stack body 4. Because the sampling assembly 3 is disposed on the tab side 41 of the cell stack 4, the corresponding end plate 24 may be provided with a second receiving groove 26. Through setting up the second storage tank, can put into this second storage tank with the sampling connector, do not influence the whole assembly shaping of module casing. The sampling assembly comprises an FPC, a conductive bar and a plastic support, and is a conventional structure in the industry.

As shown in fig. 4, an exhaust through hole 27 is opened on at least one side plate 23 of the module case 2 of the embodiment, which is arranged opposite to the tab side 41 of the cell stack body 4, and an insulating flame-retardant layer 28 covering the exhaust through hole 27 is fixed on an outer side surface of the side plate 23. Through setting up the exhaust through hole, the gaseous emission of thermal runaway is convenient for. The insulating flame-retardant layer can achieve the purpose of isolating open fire under the condition of not influencing exhaust, and the insulating flame-retardant layer can be made of mica sheets.

Wherein, the both sides wall of the alarm monitoring casing of U type structure of this embodiment does not with electric core direct contact to need to keep certain clearance, the purpose in this clearance prevents that utmost point ear side from being in the weak point and leading to electric core eruption to have uncertainty, and this clearance needs to guarantee simultaneously that after electric core thermal runaway, the material of eruption can directly spout alarm monitoring casing on, is favorable to triggering the warning.

As shown in fig. 4, an outer wall surface of a top wall 11 of the alarm monitoring casing 1 and the module casing 2 of this embodiment are connected by a heat-conducting structural adhesive 5, an inner wall surface of the top wall 11 of the alarm monitoring casing 1 is connected with a top-side sealed edge 42 of the cell stacked body 4 by the heat-conducting structural adhesive 5, and an inner side surface of a bottom plate 22 of the module casing 2 is connected with a bottom-side sealed edge 43 of the cell stacked body 4 by the heat-conducting structural adhesive 5; and an exhaust gap is reserved between each of the two side walls 12 of the alarm monitoring shell 1 and the corresponding tab side 41 of the battery cell stacking body 4. The arrangement of the heat conduction structure glue can enable heat to be rapidly transferred to the liquid cooling system to rapidly dissipate heat. The two side walls of the alarm monitoring shell are not in direct contact with the lug sides of the battery cell, a certain gap needs to be kept, the main purpose of the gap is to prevent the situation that the lug is uncertain due to the fact that the battery cell is erupted due to the weak point, meanwhile, the gap needs to guarantee that after the battery cell is out of control, the erupted substances can be effectively contacted with the inner wall surface of the alarm monitoring shell, and the flat cable embedded in the alarm monitoring shell can be effectively cut off and alarm is triggered.

As shown in fig. 6, a heat insulating material 45 is provided between adjacent cells 44 of the cell stack body 4. Not only can play a role in heat insulation, but also can play a role in absorbing expansion.

The battery module of this embodiment further includes a battery management system, and the bus bar connector 13 is connected to the battery management system through a plug connector. The battery management system can monitor the state of the flat cable channel in the alarm monitoring shell in real time, and if thermal runaway occurs, the flat cable is short-circuited inside, and abnormal states can be monitored by the battery management system at the first time and corresponding measures can be taken.

The thermal runaway alarm device of the embodiment is applied to the battery module, can diagnose the thermal runaway through the on-off of a circuit integrated in the self, and has a heat-resistant insulating material layer, so that the spread of the thermal runaway can be inhibited to a certain extent.

In the description of the present invention, it should be understood that the terms "thickness", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (12)

1. The utility model provides a thermal runaway alarm device, its characterized in that, is including alarm monitoring casing (1) and be used for connecting winding displacement connector (13) of module inside winding displacement (18), alarm monitoring casing (1) is U type structure and has roof (11) and two lateral walls (12), be equipped with on at least one internal face in roof (11) and two lateral walls (12) winding displacement connector (13).

2. A thermal runaway alarm device according to claim 1, characterised in that at least one of the busbar connectors (13) is provided on both the inner wall surface of the top wall (11) and the inner wall surfaces of the two side walls (12).

3. The thermal runaway alarm device according to claim 1, characterised in that the alarm monitoring housing (1) has a top wall (11) or/and side walls (12) with an end portion extending to form a lug (14) for fitting a bus bar connector (13).

4. The thermal runaway alarm device according to claim 1, characterised in that a groove (15) or a hollow is formed in a side wall of the alarm monitoring housing (1), and the thickness of the side wall (12) at the position of the groove (15) is smaller than the thickness of the side wall (12) at the position of a non-groove.

5. The thermal runaway alarm device according to claim 1, characterised in that the alarm monitoring housing (1) comprises a heat-resistant insulating material layer (16), a hot-melt adhesive layer (17) and an insulating material layer (19), the hot-melt adhesive layer (17) is arranged between the heat-resistant insulating material layer (16) and the insulating material layer (19), and a module internal flat cable (18) is embedded in the hot-melt adhesive layer (17).

6. The thermal runaway alarm device according to claim 5, characterised in that the overall direction of extension of the modular internal buss (18) is arranged perpendicular to the cells (44) of the cell stack (4) fitted to the alarm monitoring housing (1).

7. A battery module comprising the thermal runaway alarm device of any one of claims 1 to 6, further comprising a module housing (2) and a cell stack (4), the cell stack (4) being assembled within the module housing (2); the alarm monitoring shell (1) is located on the inner side of the module shell (2) and buckled on the battery cell stacking body (4), the top wall (11) of the alarm monitoring shell (1) is arranged corresponding to the top side sealing edge (42) of the battery cell stacking body (4), and the two side walls (12) of the alarm monitoring shell (1) are arranged corresponding to the pole lug sides (41) of the battery cell stacking body (4) respectively; the winding displacement connector (13) is located on one side of the stacking direction of the battery cell stacking body (4) and connected with a module internal winding displacement (18) of the battery cell stacking body (4).

8. The battery module according to claim 7, wherein a first receiving groove (25) for receiving the bus bar connector (13) is formed in one of the end plates (24) of the module case (2) in the stacking direction of the cell stack (4).

9. The battery module according to claim 7, wherein a sampling assembly (3) is further disposed in the module housing (2), a sampling connector (31) is disposed at one end of the sampling assembly (3), and a second accommodating groove (26) for accommodating the sampling connector (31) is opened in one of the end plates (24) of the module housing (2) along the stacking direction of the cell stack body (4).

10. The battery module according to claim 7, wherein at least one side plate (23) of the module housing (2) opposite to the tab side (41) of the cell stack (4) is provided with an exhaust through hole (27), and an insulating flame retardant layer (28) covering the exhaust through hole (27) is fixed on the outer side surface of the side plate (23).

11. The battery module according to claim 7, wherein the outer wall surface of the top wall (11) of the alarm monitoring housing (1) is connected with the module housing (2) through a heat-conducting structural adhesive (5), the inner wall surface of the top wall (11) of the alarm monitoring housing (1) is connected with the top side edge seal (42) of the cell stack body (4) through the heat-conducting structural adhesive (5), and the inner side surface of the bottom plate (22) of the module housing (2) is connected with the bottom side edge seal (43) of the cell stack body (4) through the heat-conducting structural adhesive (5); and an exhaust gap is reserved between each of the two side walls (12) of the alarm monitoring shell (1) and the corresponding tab side (41) of the battery cell stacking body (4).

12. The battery module according to claim 7, further comprising a battery management system, wherein the bus bar connector (13) is communicatively connected to the battery management system through a plug connector.

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