CN116154422A

CN116154422A - Battery module

Info

Publication number: CN116154422A
Application number: CN202310447744.7A
Authority: CN
Inventors: 徐晓磊
Original assignee: Suzhou Youlionbattery Inc
Current assignee: Suzhou Youlionbattery Inc
Priority date: 2023-04-24
Filing date: 2023-04-24
Publication date: 2023-05-23
Anticipated expiration: 2043-04-24
Also published as: CN116154422B

Abstract

The invention discloses a battery module, comprising: the battery comprises a plurality of battery cells, a plurality of bus bars and at least one isolation bracket. The battery cells are sequentially arranged and arranged, the battery cells are connected through the bus bars, the bus bars are provided with first positioning portions, the isolation support is used for being arranged between two adjacent bus bars, the isolation support comprises a support body, a plurality of second positioning portions and a plurality of third positioning portions, the second positioning portions are respectively arranged on two opposite sides of the support body and used for positioning the side edges of the bus bars, and the third positioning portions are used for being matched with the first positioning portions on the bus bars to lock and connect the isolation support and the bus bars. The isolation support is used for being arranged between two adjacent buses to realize electrical isolation between the two adjacent buses, and the two adjacent buses are respectively connected with the isolation support, so that the buses can be firmly installed.

Description

Battery module

Technical Field

The invention relates to the technical field of batteries, in particular to a battery module.

Background

With the development of new energy, the application of batteries is becoming more and more widespread. The battery module is generally composed of a plurality of battery cells, and the battery cells are connected through buses so as to realize parallel connection or serial connection between the battery cells. Based on occupation space consideration, the volume of the battery module has a trend of being smaller and smaller, the size of the battery module becomes smaller, the gap between the battery cells becomes smaller along with the battery cells, when the bus bars are connected with the battery cells, the gap between the adjacent bus bars is too small, and therefore, the adjacent bus bars have insufficient electrical distance, and therefore, the spacers are required to be arranged between the adjacent bus bars for electrical isolation, and short circuits inside the battery module are avoided. The isolation support in the current battery module is usually special, the position of the bulge used for isolation on the isolation support is fixed, when the parallel connection or series connection mode of the battery cells is changed, the original isolation support cannot be used, the isolation support needs to be redesigned, and therefore development cost of products is increased, development period is prolonged, and later maintenance cost is increased.

Therefore, it is important to develop an isolation bracket suitable for a plurality of battery modules, so that the product development period can be shortened, and the product development cost can be reduced.

Disclosure of Invention

The invention aims to provide a battery module, which adopts an isolation bracket with strong flexibility, is suitable for various serial-parallel connection modes of battery cells, and can be firmly connected with the isolation bracket.

The invention adopts the following technical scheme:

a battery module, comprising:

the battery cells are sequentially arranged;

the battery cores are connected through the bus bars, and a first positioning part is arranged on the bus bars;

the isolating support is used for being arranged between two adjacent buses, the isolating support comprises a support body, a plurality of second positioning parts and a plurality of third positioning parts, the second positioning parts are respectively arranged on two opposite sides of the support body and used for positioning the bus sides, and the third positioning parts are used for being matched with the first positioning parts on the buses to be in locking connection with the isolating support and the buses.

Preferably, the second positioning portion includes a plurality of protrusions forming receiving spaces for receiving or holding the bus bar side edges; and/or the number of the groups of groups,

the first positioning portion is a concave portion, the third positioning portion is a convex portion, or the first positioning portion is a convex portion, and the third positioning portion is a concave portion.

Preferably, when the first positioning portion is a concave portion and the third positioning portion is a convex portion, an elastic arm is provided on the bracket body, and the third positioning portion is provided on the elastic arm;

before the third positioning part is pressed into the first positioning part, the elastic arm is elastically deformed back to the busbar; after the third positioning part is pressed into the first positioning part, the elastic arm is reset.

Preferably, two corners of the bus bar adjacent to the side edges are respectively provided with a first positioning part, and each side of the bracket body is respectively provided with two third positioning parts;

the support body deviates from one side of electric core is provided with the lug, the lug is followed the length direction of support body extends.

Preferably, the method further comprises:

the insulating plate is arranged above the busbar and the isolation bracket, a first lock hole is formed in the isolation bracket, and a second lock hole corresponding to the first lock hole is formed in the insulating plate;

the locking piece is used for penetrating through the first locking hole and the second locking hole to lock and connect the insulating plate and the isolation bracket.

Preferably, the isolation bracket further comprises a wire harness member arranged on the bracket body, wherein the wire harness member is used for passing and restraining the wire harness.

Preferably, the wire harness member comprises a wire harness member body and a binding belt, the binding belt is arranged on one side of the wire harness member body, a perforation is arranged on the other side of the wire harness member body, and the binding belt is used for penetrating through the perforation on the wire harness member body and forming a binding space for a wire harness to penetrate through with the wire harness member body.

Preferably, the wire harness body is provided with a clamping groove for clamping the detection element.

Preferably, an end plate is provided on the bracket body, and a portion of the bus bar is accommodated between the end plate and the harness member and movement of the bus bar in the longitudinal direction of the bracket body is restricted.

Preferably, the plurality of electric cores are divided into a plurality of groups along the arrangement direction, each group of electric cores comprises at least one electric core connected in parallel through the bus bar, and two adjacent groups of electric cores are connected in series through the bus bar.

Compared with the prior art, the invention has the beneficial effects that at least:

the isolation support is arranged between the two adjacent buses to realize electrical isolation between the two adjacent buses, the two adjacent buses and the isolation support are initially positioned through the second positioning part on the isolation support, and the isolation support and the buses are firmly connected through the cooperation of the third positioning part on the isolation support and the first positioning part on the buses.

Drawings

Fig. 1 is a schematic view of a battery module according to an embodiment of the present invention.

Fig. 2 is a schematic view of a battery module according to an embodiment of the present invention with an insulating plate removed.

Fig. 3 is a schematic view illustrating a structure of a bus bar of a battery module according to an embodiment of the present invention.

Fig. 4 is a schematic view illustrating an angle structure of a separator support of a battery module according to an embodiment of the present invention.

Fig. 5 is a schematic view illustrating another angle structure of the separator support of the battery module according to the embodiment of the present invention.

Fig. 6 is a schematic view illustrating a structure of a battery module according to an embodiment of the present invention in an assembled state of a bus bar and a separator bracket.

Fig. 7 is a schematic view of a structure of a battery module with a parallel connection of a battery cell with a bus bar according to an embodiment of the invention.

Fig. 8 is a schematic structural diagram of a battery module according to an embodiment of the present invention when two battery cells are connected in parallel to a bus bar.

Fig. 9 is a schematic structural diagram of a battery module with three parallel battery cells connected to a bus bar according to an embodiment of the invention.

Fig. 10 is a schematic structural diagram of a battery module according to an embodiment of the present invention, in which four battery cells are connected in parallel to a bus bar.

Fig. 11 is a schematic view showing the structure of a battery module according to an embodiment of the present invention when a tie is provided to a locking member.

Fig. 12 is a schematic view of the structure of the battery module according to the embodiment of the present invention when the tie-down ties the wire harness disposed above the insulating plate.

In the figure: 100. a battery module; 1. a battery cell; 2. a busbar; 21. a first positioning portion; 3. an isolation bracket; 31. a bracket body; 32. a second positioning portion; 321. a protrusion; 33. a third positioning portion; 34. an elastic arm; 35. a wire harness member; 351. a wire harness body; 3511. perforating; 3512. a clamping groove; 3513. a wire slot; 3514. a hollow structure; 352. a strap; 36. an end plate; 37. a bump; 38. a first lock hole; 4. an insulating plate; 41. a second lock hole; 5. a locking member; 51. a head; 52. a locking part; 521. slotting; 6. a wire harness; 7. a detection element; 8. a housing; 9. a tie; 91. a tie body; 92. and (5) a tie hole.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.

The words expressing the positions and directions described in the present invention are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present invention.

Referring to fig. 1 to 6, the present invention provides a battery module 100 including: the battery module 100 may further comprise a housing 8 for accommodating the battery cells 1, a plurality of bus bars 2 and at least one isolation bracket 3, wherein the bus bars 2 are used for connecting the battery cells 1, the isolation bracket 3 is used for realizing electrical isolation between two adjacent bus bars 2.

The types of the battery cells 1 are various, including but not limited to: lithium ion batteries, nickel hydrogen batteries, lead acid batteries, supercapacitors, sodium ion batteries, lithium polymer batteries, lithium sulfur batteries, metal-air batteries, etc., in this embodiment, the cell 1 may be any type of battery. The plurality of battery cells 1 are sequentially arranged, and the arrangement modes of the battery cells 1 are various, for example: linear arrangement, square arrangement, honeycomb arrangement, multilayer stacked arrangement, and the like, and may be arranged according to actual demands. Each cell 1 may be provided with a positive tab and a negative tab, respectively, which are both located at the upper side of the cell 1 in this embodiment.

The battery cells 1 are connected through the bus bars 2, the bus bars 2 are connected with the positive electrode lugs or the negative electrode lugs of the battery cells 1 in a conventional mode, and the bus bars 2 can be connected in series or in parallel between the battery cells 1.

Specifically, the positive electrode tab of one cell 1 is connected with the negative electrode tab of another cell 1 through the bus bar 2, so that a plurality of cells 1 can be connected in series, and the output voltage of the battery module 100 can be increased after the plurality of cells 1 are connected in series. The positive lugs of the battery cells 1 are simultaneously connected with the busbar 2, the negative lugs of the battery cells 1 are simultaneously connected with the other busbar 2, parallel connection of the battery cells 1 can be realized, the battery cells 1 connected in parallel are a group of parallel battery cells 1, and the output current of the battery module 100 can be improved after the battery cells 1 are connected in parallel. The positive lugs of one group of parallel battery cells 1 are connected with the negative lugs of the other group of parallel battery cells 1 through the bus bar 2, so that the series connection of a plurality of groups of battery cells 1 can be realized.

The plurality of cells 1 can be divided into a plurality of groups along the arrangement direction, each group of cells 1 comprises at least one cell 1 connected in parallel through a bus bar 2, and two adjacent groups of cells 1 are connected in series through the bus bar 2. Referring to fig. 7, each group of the battery cells 1 includes one battery cell 1 connected by a bus bar 2, and two adjacent groups of battery cells 1 are connected in series by the bus bar 2, which is abbreviated as a group N string. Referring to fig. 8, each set of the battery cells 1 includes two battery cells 1 connected in parallel through a bus bar 2, and two adjacent sets of battery cells 1 are connected in series through the bus bar 2, abbreviated as two-parallel-N strings. Referring to fig. 9, each set of the battery cells 1 includes three battery cells 1 connected in parallel through a bus bar 2, and two adjacent sets of battery cells 1 are connected in series through the bus bar 2, abbreviated as three-parallel-N strings. Referring to fig. 10, each set of the battery cells 1 includes four battery cells 1 connected in parallel through a bus bar 2, and two adjacent sets of battery cells 1 are connected in series through the bus bar 2, abbreviated as four-parallel-N strings. The number of each group of the battery cells 1 can be set according to actual needs.

The shape of the busbar 2 is preferably approximately quadrangular, but can also be other shapes, and a plurality of structures matched with the shape of the battery cell 1 can be arranged on the busbar 2, so that the busbar 2 is better connected with the battery cell 1, and the stability of the connection between the busbar 2 and the battery cell 1 is improved. The busbar 2 may be provided with a plurality of first positioning portions 21, and preferably, the number of first positioning portions 21 is four. The first positioning portion 21 may be provided at an arbitrary position of the bus bar 2, and preferably the first positioning portion 21 is provided at a corner position of the bus bar 2. In this embodiment, the bus bars 2 are generally quadrangular in shape, and each of four corner positions of the bus bars 2 is provided with a first positioning portion 21, so that two corners of the side edges of two adjacent bus bars 2 each have a first positioning portion 21. The material of the busbar 2 is preferably a material with good conductivity and corrosion resistance, and the material of the busbar 2 can be copper, aluminum, silver and other materials, or can be copper-aluminum alloy, copper-cobalt alloy and other alloy materials, and can be selected according to actual requirements.

The battery module 100 is further provided with an isolation bracket 3, the isolation bracket 3 is used for being arranged between two adjacent buses 2, and can be that a part of the structure of the isolation bracket 3 is arranged between two adjacent buses 2, the isolation bracket 3 can prevent the two adjacent buses 2 from contacting each other to generate a short circuit in the production process, and can also prevent the battery module 100 from deforming to cause the adjacent buses 2 to contact each other to generate a short circuit in the use process. In this embodiment, each battery module 100 may be provided with a plurality of isolation brackets 3, each isolation bracket 3 is independent, and compared with the arrangement of a plurality of isolation brackets 3 into a whole, the independent isolation brackets 3 can improve the versatility and the use flexibility of the isolation brackets 3, when the arrangement mode of the battery cells 1 is changed or the number of the battery cells 1 connected by the bus bar 2 is changed, only the positions of the isolation brackets 3 need to be changed, and the isolation brackets 3 do not need to be redesigned, so that the flexibility of the isolation brackets 3 can be improved, and the battery module is suitable for various serial-parallel connection modes of the battery cells 1. On one hand, the development period can be reduced, the mold opening is not required to be redesigned, the method can be applicable to different battery modules 100, the general rate of the isolation support 3 is improved, and the cost of product development is greatly reduced; on the other hand also is favorable to the later maintenance, when partial isolation support 3 damages, only need change the isolation support 3 of damage, and other isolation supports 3 can continue to use, need not whole change all isolation supports 3 to later maintenance cost has been reduced. The isolation bracket 3 is made of an insulating material, such as plastic, rubber or composite material.

The isolation mount 3 may include a mount body 31, a plurality of second positioning portions 32, and a plurality of third positioning portions 33. The second positioning portions 32 are respectively disposed at opposite sides of the bracket body 31 and are used for positioning the side edges of the bus bar 2. The third positioning portion 33 is configured to cooperate with the first positioning portion 21 on the busbar 2 to lock and connect the isolation bracket 3 and the busbar 2.

Specifically, the second positioning portions 32 are disposed on two sides of the bracket body 31 and face the side edges of the adjacent bus bars 2, and the side edges of the adjacent bus bars 2 are clamped to the second positioning portions 32. The second positioning portion 32 may include a plurality of protrusions 321, the protrusions 321 extending from the bracket body 31 toward the bus bar 2. The protrusions 321 of each second positioning portion 32 are arranged in two rows, each row may include one or more protrusions 321, and an accommodating space is formed between the two rows of protrusions 321, and is used for accommodating or clamping the side edges of the busbar 2. The dimension between the two rows of protrusions 321 is preferably slightly smaller than the thickness of the side edge of the bus bar 2, and the side edge of the bus bar 2 and the second positioning portion 32 form interference fit, so that the second positioning portion 32 can be clamped with the bus bar 2 more stably, and the bus bar 2 is prevented from shaking relative to the second positioning portion 32. The inside edge of protruding 321 can be provided with the chamfer, can guide the side of busbar 2 to get into in the accommodation space that two rows of protruding 321 formed like this when the installation, conveniently keep apart the equipment between support 3 and the busbar 2, improve production efficiency.

The third positioning portions 33 are disposed on both sides of the bracket body 31 and correspond to the first positioning portions 21, and the number of the third positioning portions 33 is preferably the same as the number of the first positioning portions 21, for example,: two third positioning portions 33 are respectively provided on each side of the bracket body 31. In this embodiment, the first positioning portion 21 is a concave portion, the concave portion is preferably circular, the third positioning portion 33 is a convex portion, the convex portion is preferably cylindrical corresponding to the concave portion, and a chamfer can be provided at an end of the convex portion, so that the third positioning portion 33 can be inserted into the first positioning portion 21 more accurately, assembly between the isolation bracket 3 and the busbar 2 is facilitated, and production efficiency is improved. When the bus bar is used, the third positioning part 33 is inserted into the first positioning part 21, the isolation support 3 and the bus bar 2 are locked with each other, so that the stability between the isolation support 3 and the bus bar 2 is further improved, and the bus bar 2 is prevented from shaking relative to the isolation support 3.

From this, realize the initial positioning to busbar 2 through second location portion 32, rethread third location portion 33 cooperates with first location portion 21, realize the firm connection of isolation support 3 and busbar 2, compare and only set up second location portion 32, above-mentioned first location portion 21, second location portion 32 and the mode that third location portion 33 cooperatees, can realize better that isolation support 3 and busbar 2's connection is fixed, and second location portion 32 and third location portion 33 set up at same isolation support 3, isolation support 3's small.

The third positioning portion 33 may further be provided with a clamping portion (not shown), where the outer diameter of the clamping portion is greater than the inner diameter of the first positioning portion 21, and the clamping portion is preferably made of an elastic material, and after the third positioning portion 33 is inserted into the first positioning portion 21, the third positioning portion 33 can be matched with the first positioning portion 21 through the clamping portion more stably, so that the third positioning portion 33 is prevented from being separated from the first positioning portion 21. Preferably, the bracket body 31 is provided with an elastic arm 34, one end of the elastic arm 34 is suspended, the opposite end of the elastic arm 34 is connected to the bracket body 31, the third positioning portion 33 is provided on the elastic arm 34, the elastic arm 34 is elastically deformed away from the busbar 2 before the third positioning portion 33 is pressed into the first positioning portion 21, and the elastic arm 34 is reset after the third positioning portion 33 is pressed into the first positioning portion 21. The elastic arms 34 can absorb and relieve impact force and vibration generated during the use of the battery module 100, so as to further improve the stability of the connection between the isolation bracket 3 and the bus bar 2, and prevent the bus bar 2 from shaking relative to the isolation bracket 3.

In some embodiments, the first positioning portion 21 may be a protrusion, the structure of the protrusion may be the same as or similar to the protrusion, and the third positioning portion 33 may be a recess, and the structure of the recess may be the same as or similar to the recess, which also can play a role in positioning, and not described in detail.

One side of the support body 31 deviating from the battery cell 1 is preferably provided with a lug 37, the lug 37 extends along the length direction of the support body 31, when metal foreign matters fall on the bus bars 2 and the lug 37, the metal foreign matters can incline, one end of the metal foreign matters can be far away from one of the bus bars 2 by the lug 37, and the problem that the metal foreign matters overlap with two adjacent bus bars 2 and cause the two adjacent bus bars 2 to short-circuit is avoided.

In one embodiment, the battery module 100 further includes an insulating plate 4 and a locking member 5. The insulating board 4 sets up in busbar 2 and isolation support 3 top, is provided with first lockhole 38 on the isolation support 3, is provided with the second lockhole 41 that corresponds with first lockhole 38 on the insulating board 4. The insulating plate 4 is made of an insulating material, and the insulating plate 4 may be made of a material with a certain hardness, or may be made of a flexible material, and may be selected according to actual needs, which is not limited herein. The insulating plate 4 can also be a part of the shell 8 of the battery module 100, and on one hand, the insulating plate 4 can isolate the bus bars 2 from the outside, so that short circuit between the bus bars 2 caused by external metal foreign matters or liquid and the like is avoided, and the safety of the battery module 100 is further improved; on the other hand, dust can be prevented from falling to affect the performance of the battery module 100. The locking member 5 is used to pass through the first locking hole 38 and the second locking hole 41 to lock and connect the insulating plate 4 with the insulating bracket 3.

Referring to fig. 11, the locking member 5 includes a head 51 and a locking portion 52, one end of the locking portion 52 is connected to the head 51, the locking member 5 has a short screw structure, the locking portion 52 can pass through the first locking hole 38 and the second locking hole 41 and be clamped to the first locking hole 38, and the head 51 of the locking member 5 abuts on the surface of the insulating plate 4. The other end of the locking portion 52 may also be provided with a chamfer to facilitate insertion of the locking portion 52 into the first and

second locking apertures

38, 41. The locking portion 52 is preferably made of an elastic material, the outer diameter of the locking portion 52 is larger than the inner diameter of the first lock hole 38, and the locking portion 52 and the first lock hole 38 form an interference fit, so that the locking portion 52 can be clamped in the first lock hole 38 more stably, and the locking piece 5 is prevented from falling off from the isolation bracket 3.

Referring to fig. 12, the locking member 5 is further provided with a band 9, the band 9 having a band body 91 and a band hole 92, the band body 91 being capable of passing through the band hole 92 and forming a restraining space. When the battery module is used, the binding belt 9 can be used for binding the wire harness 6 arranged above the insulating plate 4, so that the wire harness 6 arranged above the insulating plate 4 can be prevented from loosening, scattering or breaking due to vibration, the wire harness 6 can be regulated, and the running stability and reliability of the battery module 100 are improved.

In some embodiments, the ribbon body 91 is disposed on one locking member 5, the ribbon holes 92 are disposed on the other locking member 5, and the two locking members 5 are disposed in adjacent pairs, so that the ribbon body 91 on one locking member 5 passes through the ribbon holes 92 on the other locking member 5 and forms a constraint space, and the wire harness 6 disposed above the insulating plate 4 can be bound, so that the wire harness 6 disposed above the insulating plate 4 can be prevented from loosening, scattering or breaking due to vibration, and the wire harness 6 can be regulated, thereby improving the stability and reliability of the operation of the battery module 100.

In some embodiments, the locking portion 52 is made of an elastic material, the middle portion of the locking portion 52 may be hollow, the side wall of the locking portion 52 is provided with a slot 521, the slot 521 may be rectangular in shape, when the locking portion 52 is inserted into the first lock hole 38 and the second lock hole 41, the locking portion 52 contracts inwards and passes through the first lock hole 38 and the second lock hole 41, and when the engaging portion of the locking portion 52 passes through the first lock hole 38, the locking portion 52 expands outwards under the action of the elastic force, so that the engaging portion is engaged at the first lock hole 38.

In a specific embodiment, the isolation bracket 3 further includes a wire harness member 35 provided on the bracket body 31, the wire harness member 35 being for passing the wire harness 6 and restraining the wire harness 6. The wire harness 35 includes a wire harness body 351 and a binding band 352, the wire harness body 351 is provided with a wire groove 3513 through which the wire harness 6 passes, the number of the binding band 352 may be one or more, in this embodiment, the number of the binding bands 352 is two, the binding band 352 is disposed on one side of the wire harness body 351, the other side of the wire harness body 351 is provided with a perforation 3511, the number of the perforation 3511 corresponds to the number of the binding bands 352, and the binding band 352 is used for passing through the perforation 3511 on the wire harness body 351 and forming a constraint space through which the wire harness 6 passes with the wire harness body 351. When the wire harness 6 is used, the wire harness 6 passes through or is placed in the wire groove 3513 of the wire harness member body 351, the binding band 352 passes through the through hole 3511 on the wire harness member body 351 and fixes the wire harness 6 in the wire groove 3513, so that the wire harness 6 can be prevented from loosening, scattering or breaking due to vibration, the wire harness 6 can be regulated, and the running stability and reliability of the battery module 100 are improved. The wire groove 3513 of the wire harness member body 351 is further provided with a hollow structure 3514, the hollow structure 3514 is beneficial to heat dissipation and weight reduction of the battery core 1, overhigh temperature of the battery module 100 is avoided, the overall performance of the battery module 100 is improved, and the hollow structure 3514 can be a waist-shaped hole.

In some embodiments, the insulating plate 4 is further provided with a through hole (not shown), the number of which may be one or more, and the aperture of the through hole may be set to be sufficient for two binding bands 352 to pass through, so that the binding bands 352 may pass through the through hole and serve to bind the wire harness 6 disposed above the insulating plate 4. As a preferred mode, the aperture of the through hole can be set to be enough for a bandage 352 to pass through, and the through holes are set in pairs, so that the bandage 352 can pass through from the bottom of the insulating plate 4 through one of the through holes, then pass through the other through hole from the upper surface of the insulating plate 4 and be connected with the through holes 3511, so that the bandage 352 and the through holes 3511 can also bind the wire harness 6 arranged above the insulating plate 4, the wire harness 6 arranged above the insulating plate 4 can be prevented from loosening, scattering or breaking due to vibration, the wire harness 6 can be regulated, and the stability and the reliability of the operation of the battery module 100 can be further improved.

The wire harness body 351 is further provided with a clamping groove 3512 for clamping the detecting element 7, the clamping groove 3512 is preferably an elastic component, the number of the clamping grooves 3512 can be one or more, and in the embodiment, the number of the clamping grooves 3512 is two. The detecting element 7 is, for example, a voltage collecting head, a part of detecting element 7 is clamped in the clamping groove 3512, one end of the detecting element 7 is connected with the busbar 2 in a welding mode, the clamping groove 3512 can effectively fix the detecting element 7, the detecting element 7 is prevented from shaking or being pulled to cause the falling of a connecting point between the detecting element 7 and the busbar 2, the welding effect is prevented from being influenced, and the welding stability of the detecting element 7 can be improved.

The bracket body 31 is further provided with an end plate 36, and a portion of the bus bar 2 is accommodated between the end plate 36 and the harness 35 and movement of the bus bar 2 in the longitudinal direction of the bracket body 31 is restricted. The end plate 36 is preferably perpendicular to the support body 31, one side of the end plate 36, which is close to the busbar 2, is clamped on one side wall of the busbar 2, and the side wall of the wire harness body 351 is clamped on the other side wall of the busbar 2, so that the busbar 2 can be limited to shake, and the stability of the busbar 2 is further improved.

In summary, the isolation support 3 of the invention has strong flexibility and is suitable for various serial-parallel connection modes of the battery cells 1. On one hand, the development period can be reduced, the mold opening is not required to be redesigned, the method can be applicable to different battery modules 100, the general rate of the isolation support 3 is improved, and the cost of product development is greatly reduced; on the other hand also is favorable to the later maintenance, when partial isolation support 3 damages, only need change the isolation support 3 of damage, and other isolation supports 3 can continue to use, need not whole change all isolation supports 3 to later maintenance cost has been reduced. The primary positioning to busbar 2 is realized through second location portion 32, rethread third location portion 33 cooperates with first location portion 21, realize the firm connection of isolation support 3 and busbar 2, compare and only set up second location portion 32, above-mentioned first location portion 21, second location portion 32 and the matched with mode of third location portion 33, can realize better that isolation support 3 and busbar 2's connection is fixed, and second location portion 32 and third location portion 33 set up at same isolation support 3, isolation support 3's small. Through setting up the elastic arm 34 on support body 31, the impact force and the vibration that produce in the use of buffer battery module 100 can be absorbed to the elastic arm 34, still further improves the stability of being connected between isolation support 3 and the busbar 2, avoids busbar 2 to keep apart support 3 relatively and takes place to rock. By arranging the insulating plate 4, on one hand, the bus bars 2 can be isolated from the outside, short circuit between the bus bars 2 caused by external metal foreign matters or liquid and the like is avoided, and the safety of the battery module 100 is further improved; on the other hand, dust can be prevented from falling to affect the performance of the battery module 100. Through setting up the wire harness piece 35, can avoid leading to wire harness 6 to become flexible, scatter or fracture because of the vibration on the one hand, regular wire harness 6, and then improve the stability and the reliability of battery module 100 operation, on the other hand can avoid detecting element 7 to rock or by being pulled and lead to detecting element 7 with busbar 2's tie point drop, and then avoid influencing the welding effect, can improve detecting element 7's welding stability.

While embodiments of the present invention have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that changes, modifications, substitutions and alterations may be made therein by those of ordinary skill in the art without departing from the spirit and scope of the invention, all such changes being within the scope of the appended claims.

Claims

1. A battery module, comprising:

the battery cells are sequentially arranged;

2. The battery module according to claim 1, wherein the second positioning portion includes a plurality of protrusions forming receiving spaces that receive or hold the bus bar sides; and/or the number of the groups of groups,

3. The battery module according to claim 2, wherein when the first positioning portion is a concave portion and the third positioning portion is a convex portion, an elastic arm is provided on the holder body, the third positioning portion being provided on the elastic arm;

4. The battery module according to claim 1, wherein two corners of the adjacent sides of the bus bar are respectively provided with one first positioning portion, and each side of the bracket body is respectively provided with two third positioning portions;

5. The battery module according to claim 1, further comprising:

6. The battery module according to claim 1, wherein the separator support further comprises a wire harness provided on the support body for passing and restraining a wire harness.

7. The battery module according to claim 6, wherein the harness member includes a harness member body and a strap, the strap is provided at one side of the harness member body, the other side of the harness member body is provided with a through hole, and the strap is used to pass through the through hole in the harness member body and form a restraining space with the harness member body for a harness to pass through.

8. The battery module according to claim 6, wherein the harness body is provided with a catching groove for catching the detecting element.

9. The battery module according to claim 6, wherein an end plate is provided on the holder body, between the end plate and the harness for accommodating a portion of the bus bar and restricting movement of the bus bar in a length direction of the holder body.

10. The battery module according to claim 1, wherein the plurality of cells are divided into a plurality of groups in an arrangement direction, each group of cells including at least one cell connected in parallel by the bus bar, and adjacent two groups of cells are connected in series by the bus bar.