Battery module and electric equipment

Abstract

The embodiment of the utility model relates to the technical field of batteries, in particular to a battery module, which comprises a case, a battery cell module, a control circuit board, a partition plate assembly and a conductive assembly, the case is provided with an accommodating cavity, the battery cell module is accommodated in the accommodating cavity, the control circuit board is fixed in the accommodating cavity, and the partition plate assembly is fixed on the case. The control circuit board and the battery cell module are arranged in a spaced mode in the first direction, the partition plate assembly is arranged between the control circuit board and the battery cell module in the first direction, the partition plate assembly comprises a first heat insulation plate and a baffle, and the baffle is fixed to the containing cavity; the first heat insulation plate is arranged on the side, close to the battery cell module, of the baffle, and the conductive assembly is electrically connected with the battery cell module and the control circuit board. According to the embodiment of the utility model, the possibility that the control circuit board is damaged when the battery cell is in thermal runaway can be reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the field of battery technology, and in particular to a battery module and an electrical device. Background Art

[0002] Traditional communication energy storage battery modules are composed of lead-acid batteries. With the rapid development of the new energy industry, lithium iron phosphate batteries are widely used due to their higher energy density and capacity, thus gradually replacing traditional lead-acid batteries.

[0003] However, in the process of realizing the utility model, the inventors found that the battery modules currently on the market mainly include a chassis, a battery cell module and a control circuit board. The battery cell module includes multiple electrically connected battery cells. The battery cells are prone to thermal runaway when in use, thereby continuously generating heat. In severe cases, open flames may be generated, affecting the use of the battery module. The prior art generally adopts the method of adding insulating materials such as aerogel between the bonding surfaces of the battery cells to slow down the thermal runaway of the battery cells, but no effective protection measures are adopted between the battery cell module and the control circuit board, which makes it easy for the electrolyte to be sprayed toward the control circuit board when the battery cells are in thermal runaway, thereby causing damage to the control circuit board. Utility Model Content

[0004] In view of the above problems, an embodiment of the present utility model provides a battery module, which overcomes the above problems or at least partially solves the above problems.

[0005] According to one aspect of the embodiment of the utility model, a battery module is provided, including a chassis, a battery module, a control circuit board, a partition assembly and a conductive assembly, wherein the chassis is provided with a receiving cavity, the battery module is received in the receiving cavity, the control circuit board is fixed to the receiving cavity, and the control circuit board and the battery module are spaced apart along a first direction, the partition assembly is arranged between the control circuit board and the battery module along the first direction, the partition assembly includes a first heat insulation board and a baffle, the baffle is fixed to the receiving cavity, the first heat insulation board is arranged on a side of the baffle close to the battery module, and the conductive assembly is electrically connected to the battery module and the control circuit board, respectively. In this way, the control circuit board is separated from the battery module.

[0006] In some embodiments, the first heat insulation board is provided with a first wire hole for the wire to pass through, the baffle is provided with a second wire hole for the wire to pass through, the first wire hole is connected to the second wire hole, and the area of ​​the first wire hole is smaller than the area of ​​the second wire hole. In this way, the wire is fixed to the baffle assembly.

[0007] In some embodiments, a side portion of the top of the baffle is bent away from the first heat insulation board to form a boss, and a notch is formed at the top of the baffle; the conductive component includes an insulating member, a transition member, and a conductive member, the insulating member is arranged on the boss, one end of the transition member is electrically connected to the battery module, the other end of the transition member passes through the notch and is connected to the insulating member, one end of the conductive member is arranged on the insulating member and is electrically connected to the transition member, and the other end of the conductive member is electrically connected to the control circuit board. In this way, the conductive component is fixed to the partition assembly.

[0008] In some embodiments, the number of the insulating member, the adapter, and the conductive member are all two, one end of the two adapters is respectively connected to the positive electrode and the negative electrode of the battery cell module, one adapter is arranged on one insulating member, one conductive member is arranged on one insulating member, and one adapter is in contact with one conductive member; the partition assembly also includes an insulating plate, the insulating plate is arranged on the boss, and the insulating plate is located between the two insulating members. In this way, the possibility of short circuit of the conductive structure on both sides of the insulating plate is reduced.

[0009] In some embodiments, both left and right sides of the baffle are bent away from the first heat insulation board to form a fixing portion, and the fixing portion is provided with a first screw hole; both opposite side plates of the chassis are provided with a first through hole, and the first through hole corresponds to the first screw hole; the chassis includes a first bolt, and the first bolt passes through the first through hole and is screwed to the first screw hole. In this way, the baffle is fixed to the chassis.

[0010] In some embodiments, the top of the baffle is bent away from the first heat insulation board to form an upper fixing plate, and the upper fixing plate abuts against the top plate of the chassis; the bottom of the baffle is bent away from the first heat insulation board to form a lower fixing plate, and the lower fixing plate abuts against the bottom plate of the chassis; the lower fixing plate is provided with a second screw hole, and the bottom plate of the chassis is provided with a second through hole, and the second through hole corresponds to the second screw hole, and the chassis further includes a second bolt, and the second bolt passes through the second through hole and is screwed to the second screw hole. In this way, the assembly of the baffle and the chassis is more stable.

[0011] In some embodiments, the battery module includes a plurality of battery cells and thermal insulation pads, the plurality of battery cells are stacked in sequence, and the plurality of battery cells are electrically connected, and at least one thermal insulation pad is disposed between any two adjacent battery cells, so as to enhance the fire prevention and thermal insulation effects between any two adjacent battery cells.

[0012] In some embodiments, an explosion-proof valve is disposed on the top of the battery cell; the battery module further comprises a second heat insulation board, the second heat insulation board is disposed between the battery cell module and the top plate of the chassis along the second direction, and the second heat insulation board is provided with a valve hole corresponding to the explosion-proof valve, so that the fluid ejected from the explosion-proof valve can pass through the valve hole.

[0013] In some embodiments, the battery cell module includes a flame retardant tape, which is sleeved on the plurality of battery cells and used to bundle the plurality of battery cells.

[0014] In some embodiments, the battery module includes two battery fixing plates, the side walls of the two battery fixing plates are respectively arranged at the head and tail sides of the plurality of battery cells, and the ends of the two battery fixing plates are fixed to the bottom plate of the chassis, so as to fix the battery module to the chassis.

[0015] In some embodiments, two opposite side panels of the chassis are provided with opposite air guide holes, and the air guide holes are located at one end of the two side panels close to the control circuit board, so that the opposite air guide holes form convection, thereby improving the heat dissipation effect of the chassis.

[0016] According to one aspect of the embodiments of the utility model, there is provided an electrical device, comprising the above-mentioned battery module.

[0017] The beneficial effect of the embodiment of the utility model is as follows: Different from the prior art, the embodiment of the utility model provides a battery module, including a chassis, a battery cell module, a control circuit board, a partition assembly and a conductive assembly, the control circuit board is fixed to the receiving cavity of the chassis, the battery cell module is received in the receiving cavity of the chassis, the control circuit board and the battery cell module are spaced apart along a first direction, the partition assembly is arranged between the control circuit board and the battery cell module, thereby separating the control circuit board from the battery cell module, so as to reduce the possibility of electrolyte spraying toward the control circuit board when the battery cell thermal runaway, and the partition assembly includes a first heat insulation board and a baffle, the first heat insulation board is arranged on the side of the baffle close to the battery cell module, thereby reducing the possibility of the battery cell damaging the control circuit board when thermal runaway occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0019] Figure 1 is a three-dimensional diagram of a battery module provided by an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 An exploded view of the battery module;

[0021] Figure 3 yes Figure 1 Schematic diagram of a battery module with the top cover and the second heat shield removed;

[0022] Figure 4 yes Figure 3 A magnified view of part A;

[0023] Figure 5 yes Figure 2 A schematic diagram of a baffle assembly;

[0024] Figure 6 yes Figure 2 Schematic diagram of the battery cell module.

[0025] The reference numerals in the specific implementation manner are as follows:

[0026] 1000. Battery module;

[0027] 100, chassis; 100a, receiving cavity; 11, panel; 12, top cover; 121, air guide hole; 13, bottom shell; 131, first through hole; 132, second through hole;

[0028] 200, battery module; 21, battery cell; 211, explosion-proof valve; 22, thermal insulation pad; 23, flame retardant tape; 24, battery fixing plate;

[0029] 300, control circuit board;

[0030] 400, partition assembly; 41, first heat insulating plate; 411, first wire hole; 42, baffle; 421, second wire hole; 422, boss; 422a, notch; 423, fixing portion; 423a, first screw hole; 424, upper fixing plate; 425, lower fixing plate; 425a, second screw hole; 43, insulating plate;

[0031] 500, conductive component; 51, insulating component; 52, adapter; 53, conductive component;

[0032] 600, second heat insulation board; 61, valve hole;

[0033] 700, battery cover assembly; 71, first valve hole; R1, first direction; R2, second direction. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0036] Traditional communication energy storage battery modules are composed of lead-acid batteries. With the rapid development of the new energy industry, lithium iron phosphate batteries are widely used due to their higher energy density and capacity, thus gradually replacing traditional lead-acid batteries.

[0037] At present, the battery modules on the market mainly include chassis, battery cell modules and control circuit boards. The battery cell modules include multiple electrically connected battery cells. The battery cells are prone to thermal runaway during use, which continuously generates heat. In severe cases, open flames may occur, affecting the use of the battery module. In the prior art, thermal insulation materials such as aerogels are generally added between the battery cells and the battery cell bonding surfaces to slow down the thermal runaway of the battery cells. However, no effective protection measures are adopted between the battery cell module and the control circuit board. It is easy for electrolyte to be sprayed toward the control circuit board when the battery cells are in thermal runaway, thereby causing damage to the control circuit board. Thermal runaway refers to the phenomenon that a system or device cannot work properly due to overheating. When the temperature exceeds the maximum temperature limit of the equipment, the performance and life of the equipment will be seriously affected, and may even cause accidents such as fire.

[0038] In the embodiment of the present application, the control circuit board and the battery module are arranged at intervals along the first direction, and the partition assembly is arranged between the control circuit board and the battery module, so as to separate the control circuit board from the battery module, so as to reduce the possibility of the electrolyte spraying to the control circuit board when the battery cell is in thermal runaway, and the first heat insulation board is arranged on the side of the baffle close to the battery module, so as to isolate a certain amount of oxygen and open flame, so as to prevent or slow down the open flame that occurs when the battery cell module is in thermal runaway, and reduce the possibility of the battery cell damaging the control circuit board during thermal runaway. In addition, by bundling a number of battery cells with flame retardant tape, arranging heat insulation pads between any two adjacent battery cells, arranging battery fixing plates at the ends of a number of battery cells, and arranging a battery cover assembly and a second heat insulation board on the top of the battery cell module, the battery cell module is placed in a relatively sealed environment, thereby reducing the probability of thermal runaway of the battery cell, and can also prevent or slow down the time of heat spread of the battery cell and the generation of open flames when thermal runaway occurs in the battery cell, so as to ensure the safety of the control circuit board and other battery cells.

[0039] See also Figure 1-3The battery module 1000 includes a chassis 100, a battery cell module 200, a control circuit board 300, a partition assembly 400, a conductive assembly 500, a second heat insulation board 600 and a battery cover assembly 700. The chassis 100 is provided with a receiving cavity 100a, and the battery cell module 200 is received in the receiving cavity 100a. The battery cell module 200 is used to provide power to external electrical equipment (not shown). In this embodiment, the number of the battery cell modules 200 is two, and the two battery cell modules 200 are arranged side by side, and there is a distance of 8 to 10 mm between the two battery cell modules 200. The gap is formed so that when one of the battery modules 200 has thermal runaway, the heat spread can be effectively prevented or slowed down to ensure the safety of the other battery module 200. It can be understood that the number of the battery modules 200 can be adjusted according to actual needs. For example, the number of the battery modules 200 can be multiple; the control circuit board 300 is fixed to the receiving cavity 100a, and the control circuit board 300 is used to control the charging and discharging of the battery module 200. The control circuit board 300 and the battery module 200 are spaced apart along the first direction R1, and the partition assembly 4 00 is arranged between the control circuit board 300 and the battery module 200 along the first direction R1 to separate the control circuit board 300 from the battery module 200, and isolate a certain amount of oxygen and open flames to prevent or slow down the open flames that appear when the battery module 200 is thermally runaway; the conductive component 500 is electrically connected to the battery cover assembly 700 and the control circuit board 300 respectively; the battery cover assembly 700 is arranged on the top of the battery module 200 to protect the battery module 200, and the battery cover assembly 700 is provided with a conductive system (not shown) and is connected to the battery cover assembly 700. The battery cell module 200 is electrically connected to manage the charging and discharging process of the battery cell module 200; the second thermal insulation board 600 is arranged between the battery cover assembly 700 and the top plate of the chassis 100 along the second direction R2, so that when the battery cell module 200 thermally runs away, the second thermal insulation board 600 can protect the battery cover assembly 700 and the battery cell module 200, and at the same time insulate the conductive system of the battery cover assembly 700 from the chassis 100. The material of the second thermal insulation board 600 is preferably mica sheet. It can be understood that the second thermal insulation board 600 can be other thermal insulation materials.

[0040] For the above-mentioned chassis 100, the chassis 100 includes a panel 11, a top cover 12, a bottom shell 13, a first bolt (not shown) and a second bolt (not shown). The panel 11, the top cover 12 and the bottom shell 13 together enclose the accommodating cavity 100a. The control circuit board 300 is fixed to the panel 11 so that the control circuit board 300 can be disassembled and assembled at the same time when the panel 11 is disassembled and assembled to improve the assembly efficiency. It can be understood that the control circuit board 300 can be fixed to the bottom shell 13 or the top cover 12. The two opposite side plates of the top cover 12 are provided with opposite air guide holes 121. The air guide holes 121 are located at one end of the two opposite side plates of the top cover 12 close to the control circuit board 300, which is conducive to forming air convection, thereby improving the heat dissipation effect of the control circuit board 300. It can be understood that the position of the air guide holes 121 can be adjusted according to needs. For example, the air guide holes 121 can be located at one end of the two opposite side plates of the top cover 12 close to the battery module 200, thereby improving the heat dissipation effect of the battery module 200; the bottom shell 13 can also be provided with corresponding air guide holes 121 to improve the heat dissipation effect of the battery module 1000. The two opposite side plates of the bottom shell 13 are both provided with first through holes 131, and the first through holes 131 are used for the first bolt to pass through. The bottom plate of the chassis 100 is provided with second through holes 132, and the second through holes 132 are used for the second bolt to pass through. 95% of the area of ​​the entire chassis 100 is sealed, which has a good protective effect against open flames that may occur due to thermal runaway.

[0041] For the battery cover assembly 700 and the second heat insulation board 600, the battery cover assembly 700 is provided with a first valve hole 71, and the second heat insulation board 600 is provided with a valve hole 61 corresponding to the first valve hole 71, so that the fluid sprayed from the battery module 200 can pass through the first valve hole 71 and the valve hole 61 in sequence, and fall to the surface of the second heat insulation board 600, so as to reduce the possibility of the fluid sprayed from the battery module 200 corroding and damaging the battery cover assembly 700 and the battery module 200. In some embodiments, the battery cover assembly 700 is composed of a PC blister shell, an aluminum row and a Teflon-encapsulated FFC wire, and has a good fireproof effect.

[0042] For the above conductive component 500, please refer to Figure 4The conductive component 500 includes an insulating member 51, an adapter 52 and a conductive member 53. The insulating member 51 is arranged on the partition assembly 400, one end of the adapter 52 is electrically connected to the battery cover assembly 700, and the other end of the adapter 52 is connected to the insulating member 51 to fix and insulate the adapter 52; one end of the conductive member 53 is arranged on the insulating member 51 and is electrically connected to the adapter 52, and the other end of the conductive member 53 is electrically connected to the control circuit board 300, so that the control circuit board 300 is electrically connected to the battery cover assembly 700, and then electrically connected to the battery cell module 200. There are two insulating parts 51, adapters 52, and conductive parts 53. One end of the two adapters 52 is respectively connected to the positive and negative poles of the battery cover assembly 700. One adapter 52 is arranged on one insulating part 51, and one conductive part 53 is arranged on one insulating part 51. Moreover, one adapter 52 contacts one conductive part 53, so that the two conductive parts 53 are respectively electrically connected to the two adapters 52.

[0043] For the above-mentioned partition assembly 400, please refer to Figure 5The partition assembly 400 includes a first heat insulation board 41, a baffle 42 and an insulating board 43. The baffle 42 is fixed to the accommodating cavity 100a. The first heat insulation board 41 is arranged on the side of the baffle 42 close to the battery module 200, and the edge of the first heat insulation board 41 is close to the chassis 100 to isolate a certain amount of oxygen and open flames, which can prevent or mitigate the open flames that appear when the battery module 200 thermally runs away; the first heat insulation board 41 is provided with a first wire hole 411 for wires (not shown) to pass through, and the first wire hole 411 is used to fix the wires. The baffle 42 is provided with a second wire hole 421 for the wire to pass through, the first wire hole 411 is connected to the second wire hole 421, and the area of ​​the first wire hole 411 is smaller than the area of ​​the second wire hole 421, so as to reduce the wire being cut by the metal material at the edge of the second wire hole 421; it can be understood that the wire includes but is not limited to the wires between the control circuit board 300, the battery module 200 and the battery cover assembly 700, the signal acquisition line and the heating film line, when the number of the wires is multiple, the number of the first wire hole 411 and the second wire hole 421 can also be adjusted to multiple accordingly, which is conducive to the neat layout of the wires; one side portion of the top of the baffle 42 is bent away from the first insulation board 41 to form a boss 422, and a notch 422a is formed at the top of the baffle 42, the insulating member 51 is fixed to the boss 422, and the other end of the adapter 52 passes through the notch 422a and is connected to the insulating member 51 to assist the adapter 52 in electrically connecting with the conductive member 53. The insulating plate 43 is arranged on the boss 422, and the insulating plate 43 is located between the two insulating parts 51 to reduce the possibility of short circuit between the two adapters 52 and the conductive part 53, and at the same time, when the battery module 1000 is assembled and wired, the short circuit between the positive and negative poles on both sides of the insulating plate 43 is reduced. The insulating plate 43 is preferably made of plastic material. It is understandable that the insulating plate 43 can be made of other insulating materials.

[0044] In some embodiments, both left and right sides of the baffle 42 are bent in a direction away from the first heat insulation plate 41 to form a fixing portion 423, and the fixing portion 423 is provided with a first screw hole 423a corresponding to the first through hole 131, and the first bolt passes through the first through hole 131 and is screwed with the first screw hole 423a, so that the baffle 42 is fastened to the bottom shell 13; the first through hole 131 is provided in the bottom shell 13, which is beneficial to the appearance of the top cover 12. It can be understood that the first through hole 131 can also be provided in the top cover 12, and the position of the fixing portion 423 can also be adjusted accordingly so that the first through hole 131 corresponds to the first screw hole 423a of the fixing portion 423. The top of the baffle plate 42 is bent in a direction away from the first heat insulation plate 41 to form an upper fixing plate 424, and the upper fixing plate 424 abuts against the top plate of the chassis 100, so that the assembly of the baffle plate 42 and the top cover 12 is more stable; the bottom of the baffle plate 42 is bent in a direction away from the first heat insulation plate 41 to form a lower fixing plate 425, and the lower fixing plate 425 abuts against the bottom plate of the chassis 100, so that the assembly of the baffle plate 42 and the bottom shell 13 is more stable; the lower fixing plate 425 is provided with a second screw hole 425a corresponding to the second through hole 132, and the second bolt is inserted into the lower fixing plate 425a. The second through hole 132 is screwed with the second screw hole 425a, so that the assembly of the baffle 42 and the bottom shell 13 is more stable; the second through hole 132 is arranged on the bottom shell 13, which is beneficial to the appearance of the top cover 12. It can be understood that the second through hole 132 can also be arranged on the top cover 12, and the second screw hole 425a can also be arranged on the upper fixing plate 424, or the upper fixing plate 424 is provided with a third screw hole (not shown), and the top cover 12 is provided with a third through hole corresponding to the third screw hole, so that the assembly of the baffle 42 and the top cover 12 is more stable.

[0045] For the above-mentioned battery module 200, please refer to Figure 6The battery module 200 includes a plurality of battery cells 21, a heat insulation pad 22, a flame retardant tape 23 and two battery fixing plates 24, the plurality of battery cells 21 are stacked in sequence, and the plurality of battery cells 21 are electrically connected, and the plurality of battery cells 21 are electrically connected to the battery cover assembly 700 respectively, so that the battery cover assembly 700 can manage the charging and discharging process of the plurality of battery cells 21; in a preferred embodiment, the number of the battery module 200 is two, and one of the battery modules 200 includes 8 battery cells 21. It can be understood that one of the battery modules The number of battery cells 21 in 200 can be adjusted according to actual needs; an explosion-proof valve 211 is provided on the top of the battery cell 21, so that the excess fluid inside the battery cell 21 can be discharged from the explosion-proof valve 211, thereby reducing the possibility of explosion and fire of the battery cell 21; the first valve hole 71 of the battery cover assembly 700 corresponds to the explosion-proof valve 211, so that the fluid ejected from the explosion-proof valve 211 can pass through the first valve hole 71, so as to reduce the possibility of the fluid ejected from the explosion-proof valve 211 corroding and damaging the battery cover assembly 700. At least one thermal insulation pad 22 is provided between any two adjacent battery cells 21, which is conducive to improving the fireproof and heat-insulating effect between any two adjacent battery cells 21; the thermal insulation pad 22 is preferably a ceramic aerogel thermal insulation pad 22, so that it has a good fireproof and heat-insulating effect. It can be understood that the thermal insulation pad 22 can be a thermal insulation pad 22 of other materials. The flame retardant tape 23 is sleeved on the plurality of battery cells 21 , and is used to bundle the plurality of battery cells 21 . The flame retardant tape 23 is made of flame retardant material to reduce the possibility of the flame retardant tape 23 being melted when the battery cell 21 is in thermal runaway. The side walls of the two battery fixing plates 24 are respectively arranged at the head and tail sides of the plurality of battery cells 21, so that when the battery cells 21 have thermal runaway and the flame retardant belt 23 is melted, the two battery fixing plates 24 can fix the plurality of battery cells 21, and at the same time reduce the possibility of deformation of the battery cells 21; the ends of the two battery fixing plates 24 are fixed to the bottom plate of the bottom shell 13, so that the battery module 200 is fixed to the bottom shell 13, and it can be understood that the ends of the battery fixing plates 24 can be fixed to the top cover 12, so that the battery module 200 is fixed to the top cover 12; the number of the battery fixing plates 24 is not limited to two, and can be multiple, so as to improve the stability of the assembly of the battery module 200 and the chassis 100. The battery fixing plates 24 are preferably made of metal so that the battery fixing plates 24 have good anti-destruction performance on the basis of fire prevention. Of course, the battery fixing plates 24 can also be made of other fireproof materials.

[0046] In an embodiment of the utility model, the battery module 1000 includes a chassis 100, a battery cell module 200, a control circuit board 300, a partition assembly 400, a second heat insulation board 600 and a battery cover assembly 700; 95% of the area of ​​the entire chassis 100 is sealed, which has a good protective effect against open flames that may occur due to thermal runaway; the control circuit board 300 is fixed to the receiving cavity 100a of the chassis 100, and the battery cell module 200 is received in the receiving cavity 100a of the chassis 100. By arranging the control circuit board 300 and the battery cell module 200 in a first direction R1, the partition assembly 400 is arranged between the control circuit board 300 and the battery cell module 200, thereby separating the control circuit board 300 from the battery cell module 200, so as to reduce the possibility of electrolyte spraying toward the control circuit board 300 when the battery cell 21 is thermally runaway, and isolating a certain amount of oxygen and open flames to prevent or slow down the battery cell module The battery module 200 is provided with a first heat insulation plate 41 and a baffle plate 42, and the first heat insulation plate 41 is arranged on the side of the baffle plate 42 close to the battery module 200, thereby reducing the possibility that the battery 21 damages the control circuit board 300 during thermal runaway; the battery cover plate assembly 700 is arranged on the top of the battery module 200, the second heat insulation plate 600 is arranged between the battery cover plate assembly 700 and the top plate of the chassis 100 along the second direction R2, the battery fixing plate 24 is arranged on both sides of the head and tail of the battery cells 21, and the flame retardant tape 23, the heat insulation pad 22 and the partition assembly 400 are arranged, so that the battery module 200 is in a relatively sealed environment, thereby reducing the probability of thermal runaway of the battery cell 21, and can also prevent or slow down the time of heat spread of the battery cell 21 and the generation of open flames when thermal runaway occurs in the battery cell 21, thereby ensuring the safety of the control circuit board 300 and other battery cells 21.

[0047] The utility model further provides an embodiment of an electric device, wherein the electric device comprises the battery module 1000. The function and structure of the battery module 1000 may refer to the above embodiments, which will not be described in detail here.

[0048] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. A battery module, characterized in that: include: The chassis is provided with a receiving cavity; The battery cell module is accommodated in the accommodation cavity; A control circuit board is fixed to the receiving cavity, and the control circuit board and the battery module are spaced apart along a first direction; A partition assembly is arranged between the control circuit board and the battery module along the first direction, the partition assembly comprises a first heat insulation plate and a baffle, the baffle is fixed to the receiving cavity, and the first heat insulation plate is arranged on a side of the baffle close to the battery module; A conductive component is electrically connected to the battery cell module and the control circuit board respectively.

2. The battery module according to claim 1, characterized in that: The first heat insulation board is provided with a first wire hole for the wire to pass through, and the baffle is provided with a second wire hole for the wire to pass through. The first wire hole is connected to the second wire hole, and the area of ​​the first wire hole is smaller than that of the second wire hole.

3. The battery module according to claim 1, characterized in that: A side portion of the top of the baffle is bent in a direction away from the first heat insulation board to form a boss, and a notch is formed at the top of the baffle; The conductive component includes an insulating part, an adapter and a conductive part, the insulating part is arranged on a boss, one end of the adapter is electrically connected to the battery cell module, the other end of the adapter passes through a notch and is connected to the insulating part, one end of the conductive part is arranged on the insulating part and is electrically connected to the adapter, and the other end of the conductive part is electrically connected to the control circuit board.

4. The battery module according to claim 3, characterized in that: There are two insulating members, two adapter members, and two conductive members, one end of each of the two adapter members is connected to the positive electrode and the negative electrode of the battery cell module, one adapter member is arranged on one insulating member, one conductive member is arranged on one insulating member, and one adapter member is in contact with one conductive member; The partition assembly further includes an insulating plate, which is disposed on the boss and is located between the two insulating members.

5. The battery module according to claim 1, characterized in that: The left and right sides of the baffle are both bent in a direction away from the first heat insulation board to form a fixing portion, and the fixing portion is provided with a first screw hole; The two opposite side plates of the chassis are both provided with a first through hole, and the first through hole corresponds to the first screw hole; The chassis includes a first bolt, which passes through the first through hole and is screwed into the first screw hole.

6. The battery module according to claim 1, characterized in that: The top of the baffle is bent in a direction away from the first heat insulation plate to form an upper fixing plate, and the upper fixing plate abuts against the top plate of the chassis; The bottom of the baffle is bent in a direction away from the first heat insulation plate to form a lower fixing plate, and the lower fixing plate abuts against the bottom plate of the chassis; The lower fixing plate is provided with a second screw hole, the bottom plate of the chassis is provided with a second through hole, the second through hole corresponds to the second screw hole, and the chassis further includes a second bolt, the second bolt passes through the second through hole and is screwed to the second screw hole.

7. The battery module according to claim 1, characterized in that: The battery cell module comprises a plurality of battery cells and thermal insulation pads. The plurality of battery cells are stacked in sequence and electrically connected. At least one thermal insulation pad is arranged between any two adjacent battery cells.

8. The battery module according to claim 7, characterized in that: An explosion-proof valve is provided on the top of the battery cell; The battery module further includes a second heat insulation plate, which is disposed between the battery cell module and the top plate of the chassis along the second direction, and the second heat insulation plate is provided with a valve hole corresponding to the explosion-proof valve.

9. The battery module according to claim 7, characterized in that: The battery cell module comprises a flame retardant tape, which is sleeved on the plurality of battery cells and used for bundling the plurality of battery cells.

10. The battery module according to claim 7, characterized in that: The battery module comprises two battery fixing plates, the side walls of the two battery fixing plates are respectively arranged on the head and tail sides of the plurality of battery cells, and the ends of the two battery fixing plates are fixed to the bottom plate of the chassis.

11. The battery module according to claim 1, characterized in that: Two opposite side panels of the chassis are provided with opposite air guide holes, and the air guide holes are located at one end of the two side panels close to the control circuit board.

12. An electrical equipment, characterized in that: Comprising a battery module as described in any one of claims 1-11.

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