Battery module and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery module and a battery pack, and the battery module comprises a shell assembly and a battery, the interior of the shell assembly is filled with cooling liquid, and the shell assembly is provided with an exposing opening, a liquid inlet used for introducing the cooling liquid and a liquid outlet used for outputting the cooling liquid. The battery is arranged in the shell assembly and comprises a pressure relief end face provided with a pressure relief structure, the pressure relief end face is in sealing fit with the inner wall of the shell assembly, and the pressure relief structure is exposed through the exposure opening. All the parts, except the pressure relief end surface, of the battery are soaked in the cooling liquid in the shell assembly, so that the temperature consistency of the battery can be improved. When the battery accidentally releases pressure through the pressure release structure and sprays out high-temperature substances, the high-temperature substances are sprayed out through the exposure opening and cannot be sprayed into the cooling liquid in the shell assembly, so that the influence on the performance of the cooling liquid is avoided, when a plurality of batteries exist, the pressure release of a single battery cannot influence other batteries, and the safety of the pressure release of the batteries is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module and a battery pack. Background Art

[0002] During the discharge and charge processes of a battery, a large amount of heat is generated, leading to a decline in battery performance and even a risk of thermal runaway. Therefore, the thermal management of the battery is extremely important for the safe charging and discharging of the battery.

[0003] In the existing battery packs, the temperature control of the battery is usually achieved by air cooling or liquid cooling. When using the air cooling temperature control method for heat dissipation or heating of the battery, the efficiency is relatively low, and it is difficult to quickly raise or lower the temperature of the battery to the preset temperature range. The liquid cooling method usually requires the arrangement of liquid cooling plates, which occupy a large amount of space inside the battery pack, complicate the structure inside the battery pack, and increase the overall size of the battery pack, making it difficult to control the cost. Moreover, the airflow generated by the air cooling method blows to a part of the battery, and the liquid cooling method usually involves local surface contact between the liquid cooling plate and the battery. The heat dissipation effect is poor at the positions where the battery does not receive the air cooling airflow and where it does not contact the surface of the liquid cooling plate. The overall temperature difference of the battery is large and the temperature is uneven. This temperature unevenness phenomenon is more obvious during high-rate discharge, resulting in too high local temperature rise of the battery, affecting the service life of the battery, and unable to ensure the operating safety of the entire battery pack. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery module and a battery pack, which can improve the temperature consistency of the battery, avoid risks such as thermal runaway caused by too high local temperature rise, extend the service life of the battery, improve the safety during the operation of the battery, and when a single battery ejects high-temperature substances through the pressure relief structure, it will not affect other batteries.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] In a first aspect, a battery module is provided, including:

[0007] A housing assembly filled with a coolant inside, and the housing assembly is provided with an exposure port, a liquid inlet for introducing the coolant, and a liquid outlet for discharging the coolant;

[0008] A battery disposed inside the housing assembly, the battery includes a pressure relief end face provided with a pressure relief structure, the pressure relief end face is in sealing cooperation with the inner wall of the housing assembly, and the pressure relief structure is exposed through the exposure port.

[0009] As a preferred solution of the battery module provided by the utility model, a first sealing member is clamped between the pressure relief end face and the inner wall of the housing assembly, and the first sealing member surrounds the pressure relief structure.

[0010] As a preferred solution of the battery module provided by the present utility model, the first seal is adhesively connected to the pressure relief end face;

[0011] and / or, the first seal is adhesively connected to the inner wall of the housing assembly.

[0012] As a preferred solution of the battery module provided by the present utility model, a pole column is further provided on the pressure relief end face, the first seal surrounds the pole column, and the pole column is exposed through the exposure port.

[0013] As a preferred solution of the battery module provided by the present utility model,

[0014] The first seal includes:

[0015] A first sealing ring body, stacked on the pressure relief end face;

[0016] A second sealing ring body, the battery has a side wall surface, and the side wall surface is arranged along the circumference of the pressure relief end face; the second sealing ring body surrounds the circumference of the side wall surface and is connected to the first sealing ring body;

[0017] Or, the first seal is spaced from the edge of the pressure relief end face.

[0018] As a preferred solution of the battery module provided by the present utility model, the first seal is integrally formed with the edge of the exposure port.

[0019] As a preferred solution of the battery module provided by the present utility model, a plurality of the batteries are arranged in the housing assembly, and the pressure relief end face of each battery is in sealed contact with the inner wall of the housing assembly through the first seal.

[0020] As a preferred solution of the battery module provided by the present utility model, the housing assembly includes:

[0021] A first housing, on which the exposure port is provided;

[0022] A second housing, detachably buckled on the first housing, and enclosing with the first housing to form an accommodation chamber for filling coolant and accommodating the battery;

[0023] A second seal, clamped between the first housing and the second housing;

[0024] Fasteners, passing through and connecting the first housing and the second housing.

[0025] As a preferred solution of the battery module provided by the present utility model, the liquid inlet is higher than the liquid outlet.

[0026] As a preferred solution of the battery module provided by the present utility model, a limiting structure for limiting the battery is provided at the bottom of the housing assembly; and / or, the battery is bonded to the bottom of the housing assembly.

[0027] In a first aspect, a battery pack is provided, including a box body and at least one battery module as described above, and the battery module is installed in the box body;

[0028] A temperature control module, a first pipeline and a second pipeline are further provided in the box body. The inner cavity of the temperature control module is communicated with the liquid inlet of one or more battery modules through the first pipeline, and is communicated with the liquid outlet of one or more battery modules through the second pipeline. The temperature control module is used to adjust the temperature of the coolant.

[0029] As a preferred solution of the battery pack provided by the present utility model, a battery management system is further provided in the box body, and a temperature measurement module is penetrated through the housing assembly. The temperature measurement end of the temperature measurement module is located inside the housing assembly to monitor the temperature of the coolant;

[0030] Both the temperature measurement module and the temperature control module are communicatively connected to the battery management system.

[0031] Advantages of the present utility model:

[0032] The present utility model provides a battery module and a battery pack including the battery module. By immersing all parts of the battery except the pressure relief end face in the coolant inside the housing assembly, it is ensured that the coolant can fully contact and exchange heat with all parts of the battery. When the coolant circulates, it can quickly and fully exchange heat with the battery. The battery is in a good heat conduction environment, which can improve the temperature consistency of the battery, avoid dangers such as thermal runaway caused by excessive local temperature rise, extend the service life of the battery, and improve the safety during battery operation. Moreover, since the battery is immersed in the coolant, there is no need to reserve space for arranging the liquid cooling plate inside the housing assembly, which improves the space utilization rate of the housing assembly, helps to reduce the size and cost. In addition, the pressure relief end face of the battery is exposed through the exposed opening on the housing assembly, and there is a sealing fit between the pressure relief end face and the inner wall of the housing assembly. The pressure relief end face does not contact the coolant. When the battery accidentally discharges high-temperature substances through the pressure relief structure, the high-temperature substances are ejected through the exposed opening, and will not be ejected into the coolant inside the housing assembly, avoiding affecting the performance of the coolant. That is, the existence of the exposed opening provides a separate channel for the pressure relief of the battery, further ensuring the safety of battery pressure relief. When there are multiple batteries inside the housing, the high-temperature substances ejected during the pressure relief of a single battery will only be ejected through the exposed opening and will not affect other batteries, which helps to further improve the use safety. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments of the present utility model. Obviously, the following described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the drawings.

[0034] Figure 1 It is a schematic connection diagram of a battery module and a temperature control module provided by the specific embodiment of the present utility model;

[0035] Figure 2 It is an exploded view of the battery module provided by the specific embodiment of the present utility model;

[0036] Figure 3 is Figure 2 The partial enlarged view at position B in;

[0037] Figure 4 is Figure 1 The partial enlarged view at position A in;

[0038] Figure 5 is Figure 2 The partial enlarged view at position C in;

[0039] Figure 6 is Figure 1 The partial enlarged view at position D in;

[0040] Figure 7 It is a schematic connection diagram of a battery management system and internal components of a battery pack provided by the specific embodiment of the present utility model.

[0041] In the figure:

[0042] 100, battery module; 200, temperature control module; 300, first pipeline; 400, second pipeline; 500, battery management system; 600, water pump;

[0043] 201, heater; 202, cooler; 203, controller;

[0044] 1, housing assembly; 2, battery; 3, first seal; 4, temperature measurement module;

[0045] 10, accommodation chamber; 11, exposure port; 12, liquid inlet; 13, liquid outlet; 14, first housing; 15, second housing; 16, second seal; 17, fastener; 18, washer;

[0046] 141, first flanging;

[0047] 151, second flanging; 152, limiting boss; 153, bushing;

[0048] 20. Pressure relief structure; 21. Pressure relief end face; 22. Positive terminal; 23. Negative terminal; 24. Side wall surface;

[0049] 31. First sealing ring body; 32. Second sealing ring body. Detailed implementation manner

[0050] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0051] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0053] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "left", and "right" are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0054] In this embodiment, the term "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this utility model, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0055] In the embodiments of this utility model, the same reference numerals represent the same components. And for the sake of brevity, in different embodiments, the detailed description of the same components is omitted.

[0056] As Figure 1 and Figure 2 shown, this embodiment provides a battery module 100, which includes a housing assembly 1 and a battery 2. The housing assembly 1 defines a receiving chamber 10, and the receiving chamber 10 is filled with a coolant. The housing assembly 1 is provided with an exposure port 11, a liquid inlet 12 for introducing the coolant, and a liquid outlet 13 for discharging the coolant. Both the liquid inlet 12 and the liquid outlet 13 are in communication with the receiving chamber 10 of the housing assembly 1, and the circulation of the coolant in the receiving chamber 10 is realized by introducing liquid through the liquid inlet 12 and discharging liquid through the liquid outlet 13. The battery 2 is disposed in the receiving chamber 10 of the housing assembly 1. Refer to Figure 3 and Figure 4 , the battery 2 includes a pressure relief end face 21 provided with a pressure relief structure 20. The pressure relief end face 21 is in sealing cooperation with the inner wall of the housing assembly 1, and the pressure relief structure 20 is exposed through the exposure port 11.

[0057] In the battery module 100 provided in this embodiment, by immersing all parts of the battery 2 except the pressure relief end face 21 in the coolant in the housing assembly 1, it is ensured that the coolant can fully contact and exchange heat with all parts of the battery 2. When the coolant circulates, it can quickly and fully exchange heat with the battery 2. The battery 2 is in a good heat conduction environment, which can improve the temperature consistency of the battery 2, avoid dangers such as thermal runaway caused by excessive local temperature rise, extend the service life of the battery 2, and improve the safety of the battery 2 during operation. Moreover, the battery 2 is immersed in the coolant, and there is no need to reserve space for arranging a liquid cooling plate in the housing assembly 1, which improves the space utilization rate of the housing assembly 1 and helps to reduce the size and cost.

[0058] In some embodiments, the coolant has insulating properties, that is, it is an insulating coolant. Exemplarily, the insulating coolant can be silicone oil, and silicone oil has good insulating properties.

[0059] Additionally, refer to Figure 4The pressure relief end face 21 of the battery 2 is exposed through the exposure port 11 on the shell assembly 1, and the pressure relief end face 21 is sealed with the inner wall of the shell assembly 1, and the pressure relief end face 21 does not contact the coolant. When the battery 2 accidentally releases pressure through the pressure relief structure 20 to spray high-temperature substances, the high-temperature substances are sprayed out through the exposure port 11, and will not be sprayed into the coolant in the shell assembly 1, so as to avoid affecting the insulation performance of the coolant. That is, the existence of the exposure port 11 provides a separate channel for the pressure relief of the battery 2, further ensuring the safety of the pressure relief of the battery 2. When there are multiple batteries 2 inside the shell, the high-temperature substances sprayed when a single battery 2 is depressurized will only be sprayed out through the exposure port 11, and will not affect other batteries 2, which helps to further improve the safety of use.

[0060] In some embodiments, a plurality of batteries 2 are disposed in the housing assembly 1 , and the plurality of batteries 2 may be arranged in one row or multiple rows. A revealing opening 11 is correspondingly provided for each battery 2 to reveal the pressure relief structure 20 of the battery 2 .

[0061] Alternatively, see Figure 2 and Figure 3 A first seal 3 is sandwiched between the pressure relief end face 21 and the inner wall of the housing assembly 1, and the first seal 3 is arranged outside the pressure relief structure 20. The arrangement of the first seal 3 makes the pressure relief end face 21 and the inner wall of the housing assembly 1 sealed, ensuring the sealing of the accommodating chamber 10, preventing the coolant from leaking, and preventing the high-temperature substances ejected by the battery 2 through the pressure relief structure 20 from entering the coolant through the gap between the housing assembly 1 and the pressure relief end face 21.

[0062] Exemplarily, the first sealing member 3 is a rubber ring.

[0063] In this embodiment, see Figure 1 , Figure 2 , Figure 5 as well as Figure 6 The housing assembly 1 includes a first housing 14, a second housing 15, a second sealing member 16 and a plurality of fasteners 17. The first housing 14 is provided with a plurality of the above-mentioned revealing openings 11, and the plurality of revealing openings 11 correspond one to one with the plurality of batteries 2. The second housing 15 is detachably buckled on the first housing 14, and together with the first housing 14, encloses the above-mentioned accommodation chamber 10 for filling the coolant and the battery 2. The second sealing member 16 is sandwiched between the first housing 14 and the second housing 15 to ensure the sealing between the first housing 14 and the second housing 15. The fastener 17 is penetrated and connected to the first housing 14 and the second housing 15 to ensure a firm connection between the first housing 14 and the second housing 15.

[0064] Exemplarily, the second sealing member 16 is a rubber ring.

[0065] Further, a first flanging 141 is circumferentially provided on the first housing 14, and a second flanging 151 is circumferentially provided on the second housing 15. When assembling the battery module 100, the second seal 16 can be first installed on the second flanging 151 of the second housing 15. Exemplarily, the second seal 16 can be bonded to the second housing 15, or a groove can be provided on the second housing 15 to position and install the second seal 16. Then, the first housing 14 is buckled on the second housing 15 to align the first flanging 141 with the second flanging 151, and a plurality of fasteners 17 are used to pass through and connect the first flanging 141 and the second flanging 151. For example, the fastener 17 passes through the first flanging 141 and is threadedly connected to the second flanging 151.

[0066] Specifically, a plurality of bushings 153 are provided on the side of the second flanging 151 facing away from the first flanging 141. The plurality of bushings 153 are circumferentially spaced apart along the second flanging 151. Each fastener 17 passes through the connection hole on the first flanging 141, the connection hole on the second flanging 151, and is threadedly screwed into the bushing 153 to achieve a firm connection between the first housing 14 and the second housing 15. The setting of the bushing 153 increases the distance of the threaded screwing section, making the threaded connection more firm and reliable.

[0067] Exemplarily, the fastener 17 is a bolt or a screw. A washer 18 is provided between the head of the fastener 17 and the first flanging 141. The washer 18 is sleeved on the screw part of the fastener 17, which plays a role in absorbing vibration and buffering shock, and avoids the loosening of the threaded connection.

[0068] Further, a limiting boss 152 is convexly provided on the side of the second flanging 151 facing the first flanging 141. The limiting boss 152 is fitted with the first flanging 141, effectively improving the stability and sealing degree after the installation of the first housing 14 and the second housing 15.

[0069] In some embodiments, the first seal 3 is adhesively connected to the pressure relief end face 21; and / or, the first seal 3 is adhesively connected to the inner wall of the housing assembly 1. For example, the first seal 3 is adhesively connected to the pressure relief end face 21. When the first housing 14 is installed on the second housing 15, under the action of the fastener 17, the first housing 14 presses the first seal 3, which can ensure the sealing degree between the first seal 3 and the first housing 14. Or, the first seal 3 is adhesively connected to both the pressure relief end face 21 and the inner wall of the first housing 14, effectively ensuring the sealing performance.

[0070] Exemplarily, the first seal 3 is adhesively connected to the pressure relief end face 21 and / or the inner wall of the housing assembly 1 through a thermally conductive structural adhesive. The thermally conductive structural adhesive can be a polyurethane thermally conductive structural adhesive.

[0071] Alternatively, in some embodiments, the first seal 3 can be integrally formed with the edge of the exposure opening 11, reducing the number of components and the assembly process, and improving production efficiency. Exemplarily, when machining the housing assembly 1, the housing assembly 1 with the first seal 3 is formed by an integral casting process or an integral stamping process.

[0072] See Figure 3 and Figure 4 , a terminal post is further provided on the pressure relief end face 21, the first seal 3 is disposed around the terminal post, and the terminal post is exposed through the exposure opening 11. That is, both the terminal post and the pressure relief structure 20 are exposed through the exposure opening 11, facilitating the electrical connection between the terminal post and the external bus bar. Moreover, since the pressure relief end face 21 is not immersed in the coolant, the amount of coolant can be reduced, achieving the effects of reducing the size of the battery module 100 and lowering the cost.

[0073] Figure 3 and Figure 4 As shown in the battery 2 in and, the battery 2 is a square battery 2, and a positive terminal post 22 and a negative terminal post 23 are provided on the pressure relief end face 21, and both the positive terminal post 22 and the negative terminal post 23 are exposed through the exposure opening 11. In other embodiments, the battery 2 can also be a cylindrical battery or other types of batteries. For a cylindrical battery, its positive terminal post 22 and the pressure relief structure 20 are on the same surface, and the first seal 3 is arranged on this surface, and the first seal 3 is disposed around the pressure relief structure 20 and the positive terminal post 22.

[0074] Such as Figure 3 As shown, the first seal 3 includes a first seal ring body 31 and a second seal ring body 32. Among them, the first seal ring body 31 is stacked on the pressure relief end face 21. The battery 2 has a side wall surface 24, and the side wall surface 24 is arranged along the circumference of the pressure relief end face 21; the second seal ring body 32 is disposed around the circumference of the side wall surface 24 and is connected to the first seal ring body 31. That is, the first seal 3 is sleeved on the upper edge of the battery 2, ensuring the installation stability between the first seal 3 and the battery 2, preventing the first seal 3 from falling off, and also facilitating the positioning of the first seal 3 on the battery 2.

[0075] In some embodiments, the first seal 3 is spaced from the edge of the pressure relief end face 21. At this time, the area formed between the outer circumference of the first seal 3 and the edge of the pressure relief end face 21 can be in contact with the coolant, so that the coolant can contact the area on the pressure relief end face 21 except for the pressure relief structure 20 and the terminal post, which helps to dissipate heat and cool down at the pressure relief end face 21.

[0076] In some other embodiments, the first seal 3 may also completely cover the area on the pressure relief end face 21 except for the pressure relief structure 20 and the pole post. It can be understood that when multiple batteries 2 are arranged in the housing assembly 1, the pressure relief end face 21 of each battery 2 is in sealed contact with the inner wall of the housing assembly 1 through the first seal 3, ensuring that each battery 2 has an independent pressure relief channel.

[0077] Optionally, referring to Figure 2 , the liquid inlet 12 is higher than the liquid outlet 13, so that the coolant flows out through the lower liquid outlet 13 under the action of gravity, accelerating the circulation flow rate of the coolant in the accommodation chamber 10.

[0078] In some embodiments, a limiting structure for limiting the battery 2 is provided at the bottom of the housing assembly 1. For example, the limiting structure includes a profiling hole adapted to the bottom of the battery 2, or includes a cross beam for limiting the battery 2, etc., as long as it can limit the battery 2. By providing the limiting structure, when assembling the battery module 100, the battery 2 can be firmly fixed to the bottom of the housing assembly 1 first, preventing the seal at the first seal 3 from being defective due to the displacement of the battery 2 when the first seal 3 is in sealed contact with the edge of the exposed opening 11.

[0079] Alternatively, in some embodiments, the battery 2 is bonded to the bottom of the housing assembly 1, for example, by a thermally conductive structural adhesive. When assembling the battery module 100, the battery 2 can be firmly bonded to the bottom of the housing assembly 1 first, preventing the seal at the first seal 3 from being defective due to the displacement of the battery 2 when the first seal 3 is in sealed contact with the edge of the exposed opening 11.

[0080] In some other embodiments, a combination of a limiting structure and a bonding connection can be adopted between the battery 2 and the bottom of the housing assembly 1 to further improve the fixing stability of the battery 2.

[0081] Specifically, the above-mentioned limiting structure for limiting the battery is provided on the second housing 15 of the housing assembly 1; and / or, the battery 2 is bonded to the second housing 15 of the housing assembly 1.

[0082] This embodiment also provides a battery pack, including a box body and at least one battery module 100 as described above, and the battery module 100 is installed in the box body. Referring to Figure 1, a temperature control module 200, a first pipeline 300, and a second pipeline 400 are further provided inside the box. The inner cavity of the temperature control module 200 is connected to the liquid inlet 12 of one or more battery modules 100 through the first pipeline 300, and is connected to the liquid outlet 13 of one or more battery modules 100 through the second pipeline 400. The temperature control module 200 is used to adjust the temperature of the coolant. The coolant heated or cooled by the temperature control module 200 is transported to the housing assembly 1 of the battery module 100 through the first pipeline 300. The coolant in the housing assembly 1 returns to the inside of the temperature control module 200 again through the liquid outlet 13 and the second pipeline 400, realizing the circulating flow of the coolant.

[0083] Further, in combination with Figure 7 , a water pump 600 is provided on the first pipeline 300 or the second pipeline 400 to provide power for the flow of the coolant.

[0084] Specifically, referring to Figure 7 , the temperature control module 200 includes a heater 201, a cooler 202, and a controller 203. The heater 201 is used to heat the coolant, the cooler 202 is used to cool down the coolant, and the controller 203 is used to control the opening and closing of the heater 201 and the cooler 202.

[0085] Referring to Figure 7 , a battery management system 500 (BMS) is further provided inside the box. In combination with Figure 2 , a temperature measurement module 4 penetrates through the housing assembly 1. The temperature measurement end of the temperature measurement module 4 is located inside the housing assembly 1 to be immersed in the coolant, so as to monitor the temperature of the coolant. Both the temperature measurement module 4 and the controller 203 of the temperature control module 200 are communicatively connected to the battery management system 500. When the temperature measured by the temperature measurement module 4 exceeds the preset temperature range of the coolant, the battery management system 500 receives the information and sends an instruction to the controller 203 of the temperature control module 200, so that the controller 203 controls the heater 201 to start or controls the cooler 202 to start.

[0086] Exemplarily, the temperature measurement module 4 includes a temperature sensor. The heater 201 or the cooler 202 can be a coil heat exchanger. For example, the cooler 202 is a condenser and the heater 201 is an evaporator.

[0087] The thermal management process of the battery pack provided in this embodiment is generally as follows:

[0088] The temperature measurement module 4 monitors the temperature of the coolant in the housing assembly 1 in real time. When the currently detected temperature is lower than the lowest value of the preset temperature range, the battery management system 500 receives the information that the temperature of the battery 2 is too low, and issues an instruction to the controller 203 of the temperature control module 200. The controller 203 controls the heater 201 to work and starts the water pump 600 to make the coolant circulate, so that the battery 2 can be quickly heated to a suitable operating temperature. When the currently detected temperature by the temperature measurement module 4 is higher than the highest value of the preset temperature range, the battery management system 500 receives the information that the temperature of the battery 2 is too high, and issues an instruction to the controller 203 of the temperature control module 200. The controller 203 controls the cooler 202 to work and starts the water pump 600 to make the coolant circulate, so that the battery 2 can be quickly cooled to a suitable operating temperature, avoiding thermal runaway caused by overheating of the battery 2 and extending the service life of the battery 2.

[0089] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery module, characterized in that: include: A shell component (1) is filled with a coolant, and the shell component (1) is provided with an exposure port (11), a liquid inlet (12) for introducing the coolant, and a liquid outlet (13) for outputting the coolant; A battery (2) is arranged in the housing assembly (1), the battery (2) comprising a pressure relief end surface (21) provided with a pressure relief structure (20), the pressure relief end surface (21) being in sealing cooperation with the inner wall of the housing assembly (1), the pressure relief structure (20) being exposed through the exposure opening (11).

2. The battery module according to claim 1, characterized in that: A first sealing member (3) is sandwiched between the pressure relief end surface (21) and the inner wall of the housing assembly (1), and the first sealing member (3) is arranged outside the pressure relief structure (20).

3. The battery module according to claim 2, characterized in that: The first sealing member (3) is bonded to the pressure relief end surface (21); And / or, the first sealing member (3) is adhesively connected to the inner wall of the housing assembly (1).

4. The battery module according to claim 2, characterized in that: A pole is also provided on the pressure relief end surface (21), the first sealing member (3) is arranged outside the pole, and the pole is exposed through the exposure opening (11).

5. The battery module according to any one of claims 2 to 4, characterized in that: The first sealing member (3) comprises: A first sealing ring body (31) is stacked on the pressure relief end surface (21); A second sealing ring body (32), the battery (2) having a side wall surface (24), the side wall surface (24) being arranged along the circumference of the pressure relief end surface (21); the second sealing ring body (32) being arranged around the circumference of the side wall surface (24) and connected to the first sealing ring body (31); Alternatively, the first sealing member (3) is spaced apart from the edge of the pressure relief end surface (21).

6. The battery module according to any one of claims 2 to 4, characterized in that: The first sealing member (3) is integrally formed with the edge of the revealing opening (11).

7. The battery module according to any one of claims 2 to 4, characterized in that: A plurality of batteries (2) are arranged in the housing assembly (1), and the pressure relief end surface (21) of each battery (2) is in sealing contact with the inner wall of the housing assembly (1) via the first sealing member (3).

8. The battery module according to any one of claims 1 to 4, characterized in that: The housing assembly (1) comprises: A first shell (14), wherein the revealing opening (11) is provided on the first shell (14); A second shell (15) is detachably fastened to the first shell (14), and together with the first shell (14) forms a receiving chamber (10) for filling a coolant and receiving the battery (2); A second sealing member (16) is sandwiched between the first shell (14) and the second shell (15); A fastener (17) is inserted through and connected to the first shell (14) and the second shell (15).

9. The battery module according to any one of claims 1 to 4, characterized in that: The liquid inlet (12) is higher than the liquid outlet (13).

10. The battery module according to any one of claims 1 to 4, characterized in that: The bottom of the housing assembly (1) is provided with a limiting structure for limiting the position of the battery (2); and / or the battery (2) is bonded to the bottom of the housing assembly (1).

11. A battery pack, characterized in that: comprising a box and at least one battery module according to any one of claims 1 to 10, wherein the battery module (100) is installed in the box; The box body is also provided with a temperature control module (200), a first pipeline (300) and a second pipeline (400); the inner cavity of the temperature control module (200) is connected to the liquid inlet (12) of one or more battery modules (100) through the first pipeline (300), and is connected to the liquid outlet (13) of one or more battery modules (100) through the second pipeline (400); the temperature control module (200) is used to adjust the temperature of the coolant.

12. The battery pack according to claim 11, characterized in that: A battery management system (500) is also provided in the box body, a temperature measuring module (4) is provided on the shell component (1), and a temperature measuring end of the temperature measuring module (4) is located in the shell component (1) to monitor the temperature of the coolant; The temperature measurement module (4) and the temperature control module (200) are both communicatively connected to the battery management system (500).

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